boards/risk-v/k210: migrate to SPDX identifier

Most tools used for compliance and SBOM generation use SPDX identifiers
This change brings us a step closer to an easy SBOM generation.

Signed-off-by: Alin Jerpelea <alin.jerpelea@sony.com>

boards/risc-v/k210/maix-bit/CMakeLists.txt

@@ -1,6 +1,8 @@
 # ##############################################################################
 # boards/risc-v/k210/maix-bit/CMakeLists.txt
 #
+# SPDX-License-Identifier: Apache-2.0
+#
 # Licensed to the Apache Software Foundation (ASF) under one or more contributor
 # license agreements.  See the NOTICE file distributed with this work for
 # additional information regarding copyright ownership.  The ASF licenses this

boards/risc-v/k210/maix-bit/include/board.h

@@ -1,6 +1,8 @@
 /****************************************************************************
  * boards/risc-v/k210/maix-bit/include/board.h
  *
+ * SPDX-License-Identifier: Apache-2.0
+ *
  * Licensed to the Apache Software Foundation (ASF) under one or more
  * contributor license agreements.  See the NOTICE file distributed with
  * this work for additional information regarding copyright ownership.  The

boards/risc-v/k210/maix-bit/kernel/Makefile

@@ -1,6 +1,8 @@
 ############################################################################
 # boards/risc-v/k210/maix-bit/kernel/Makefile
 #
+# SPDX-License-Identifier: Apache-2.0
+#
 # Licensed to the Apache Software Foundation (ASF) under one or more
 # contributor license agreements.  See the NOTICE file distributed with
 # this work for additional information regarding copyright ownership.  The

boards/risc-v/k210/maix-bit/kernel/k210_userspace.c

@@ -1,6 +1,8 @@
 /****************************************************************************
  * boards/risc-v/k210/maix-bit/kernel/k210_userspace.c
  *
+ * SPDX-License-Identifier: Apache-2.0
+ *
  * Licensed to the Apache Software Foundation (ASF) under one or more
  * contributor license agreements.  See the NOTICE file distributed with
  * this work for additional information regarding copyright ownership.  The

boards/risc-v/k210/maix-bit/scripts/Make.defs

@@ -1,6 +1,8 @@
 ############################################################################
 # boards/risc-v/k210/maix-bit/scripts/Make.defs
 #
+# SPDX-License-Identifier: Apache-2.0
+#
 # Licensed to the Apache Software Foundation (ASF) under one or more
 # contributor license agreements.  See the NOTICE file distributed with
 # this work for additional information regarding copyright ownership.  The

boards/risc-v/k210/maix-bit/scripts/ld.script

@@ -1,6 +1,8 @@
 /****************************************************************************
  * boards/risc-v/k210/maix-bit/scripts/ld.script
  *
+ * SPDX-License-Identifier: Apache-2.0
+ *
  * Licensed to the Apache Software Foundation (ASF) under one or more
  * contributor license agreements.  See the NOTICE file distributed with
  * this work for additional information regarding copyright ownership.  The

boards/risc-v/k210/maix-bit/scripts/memory.ld

@@ -1,6 +1,8 @@
 /****************************************************************************
  * boards/risc-v/k210/maix-bit/scripts/memory.ld
  *
+ * SPDX-License-Identifier: Apache-2.0
+ *
  * Licensed to the Apache Software Foundation (ASF) under one or more
  * contributor license agreements.  See the NOTICE file distributed with
  * this work for additional information regarding copyright ownership.  The

boards/risc-v/k210/maix-bit/scripts/user-space.ld

@@ -1,6 +1,8 @@
 /****************************************************************************
  * boards/risc-v/k210/maix-bit/scripts/user-space.ld
  *
+ * SPDX-License-Identifier: Apache-2.0
+ *
  * Licensed to the Apache Software Foundation (ASF) under one or more
  * contributor license agreements.  See the NOTICE file distributed with
  * this work for additional information regarding copyright ownership.  The

boards/risc-v/k210/maix-bit/src/CMakeLists.txt

@@ -1,6 +1,8 @@
 # ##############################################################################
 # boards/risc-v/k230/canmv230/src/CMakeLists.txt
 #
+# SPDX-License-Identifier: Apache-2.0
+#
 # Licensed to the Apache Software Foundation (ASF) under one or more contributor
 # license agreements.  See the NOTICE file distributed with this work for
 # additional information regarding copyright ownership.  The ASF licenses this

boards/risc-v/k210/maix-bit/src/Makefile

@@ -1,6 +1,8 @@
 ############################################################################
 # boards/risc-v/k210/maix-bit/src/Makefile
 #
+# SPDX-License-Identifier: Apache-2.0
+#
 # Licensed to the Apache Software Foundation (ASF) under one or more
 # contributor license agreements.  See the NOTICE file distributed with
 # this work for additional information regarding copyright ownership.  The

boards/risc-v/k210/maix-bit/src/k210_appinit.c

@@ -1,6 +1,8 @@
 /****************************************************************************
  * boards/risc-v/k210/maix-bit/src/k210_appinit.c
  *
+ * SPDX-License-Identifier: Apache-2.0
+ *
  * Licensed to the Apache Software Foundation (ASF) under one or more
  * contributor license agreements.  See the NOTICE file distributed with
  * this work for additional information regarding copyright ownership.  The

boards/risc-v/k210/maix-bit/src/k210_boot.c

@@ -1,6 +1,8 @@
 /****************************************************************************
  * boards/risc-v/k210/maix-bit/src/k210_boot.c
  *
+ * SPDX-License-Identifier: Apache-2.0
+ *
  * Licensed to the Apache Software Foundation (ASF) under one or more
  * contributor license agreements.  See the NOTICE file distributed with
  * this work for additional information regarding copyright ownership.  The

boards/risc-v/k210/maix-bit/src/k210_bringup.c

@@ -1,6 +1,8 @@
 /****************************************************************************
  * boards/risc-v/k210/maix-bit/src/k210_bringup.c
  *
+ * SPDX-License-Identifier: Apache-2.0
+ *
  * Licensed to the Apache Software Foundation (ASF) under one or more
  * contributor license agreements.  See the NOTICE file distributed with
  * this work for additional information regarding copyright ownership.  The

boards/risc-v/k210/maix-bit/src/k210_gpio.c

@@ -1,6 +1,8 @@
 /****************************************************************************
  * boards/risc-v/k210/maix-bit/src/k210_gpio.c
  *
+ * SPDX-License-Identifier: Apache-2.0
+ *
  * Licensed to the Apache Software Foundation (ASF) under one or more
  * contributor license agreements.  See the NOTICE file distributed with
  * this work for additional information regarding copyright ownership.  The

boards/risc-v/k210/maix-bit/src/k210_leds.c

@@ -1,6 +1,8 @@
 /****************************************************************************
  * boards/risc-v/k210/maix-bit/src/k210_leds.c
  *
+ * SPDX-License-Identifier: Apache-2.0
+ *
  * Licensed to the Apache Software Foundation (ASF) under one or more
  * contributor license agreements.  See the NOTICE file distributed with
  * this work for additional information regarding copyright ownership.  The

boards/risc-v/k210/maix-bit/src/maix-bit.h

@@ -1,6 +1,8 @@
 /****************************************************************************
  * boards/risc-v/k210/maix-bit/src/maix-bit.h
  *
+ * SPDX-License-Identifier: Apache-2.0
+ *
  * Licensed to the Apache Software Foundation (ASF) under one or more
  * contributor license agreements.  See the NOTICE file distributed with
  * this work for additional information regarding copyright ownership.  The