boards/rp23xx: Split the xipfs configuration into xipfs and xipfs-nxflat.

The xipfs configuration enabled CONFIG_NXFLAT and the nxflatxip example,
whose build runs mknxflat to generate the module thunk.  The NXFLAT tools
are not installed in the CI container, so every CI build of this
configuration failed with "mknxflat: command not found".

* xipfs keeps the file system, the xipfs command and the test suite.  It
  builds with a plain toolchain, so CI still covers the file system code.
* xipfs-nxflat adds CONFIG_NXFLAT and CONFIG_EXAMPLES_NXFLATXIP and is
  excluded from the CI build list, the same treatment the other NXFLAT
  configurations already get (eagle100:nxflat, lm3s6965-ek:qemu-nxflat,
  olimex-lpc1766stk:thttpd-nxflat).

Impact: CI and board configurations only.  No source or runtime change.

Assisted-by: Claude Code:claude-opus-5
Signed-off-by: Marco Casaroli <marco.casaroli@gmail.com>

boards/arm/rp23xx/pimoroni-pico-2-plus/configs/xipfs-nxflat/defconfig

@@ -0,0 +1,54 @@
+#
+# This file is autogenerated: PLEASE DO NOT EDIT IT.
+#
+# You can use "make menuconfig" to make any modifications to the installed .config file.
+# You can then do "make savedefconfig" to generate a new defconfig file that includes your
+# modifications.
+#
+# CONFIG_NSH_ARGCAT is not set
+# CONFIG_NSH_CMDOPT_HEXDUMP is not set
+# CONFIG_NSH_DISABLE_DATE is not set
+# CONFIG_NSH_DISABLE_LOSMART is not set
+# CONFIG_STANDARD_SERIAL is not set
+CONFIG_ARCH="arm"
+CONFIG_ARCH_BOARD="pimoroni-pico-2-plus"
+CONFIG_ARCH_BOARD_COMMON=y
+CONFIG_ARCH_BOARD_PIMORONI_PICO_2_PLUS=y
+CONFIG_ARCH_CHIP="rp23xx"
+CONFIG_ARCH_CHIP_RP23XX=y
+CONFIG_ARCH_RAMVECTORS=y
+CONFIG_ARCH_STACKDUMP=y
+CONFIG_BOARDCTL_RESET=y
+CONFIG_BOARD_LOOPSPERMSEC=10450
+CONFIG_BUILTIN=y
+CONFIG_DEBUG_FULLOPT=y
+CONFIG_DEBUG_SYMBOLS=y
+CONFIG_DISABLE_POSIX_TIMERS=y
+CONFIG_EXAMPLES_HELLO=y
+CONFIG_EXAMPLES_NXFLATXIP=y
+CONFIG_FS_PROCFS=y
+CONFIG_FS_PROCFS_REGISTER=y
+CONFIG_FS_XIPFS=y
+CONFIG_FS_XIPFS_FAULT_INJECT=y
+CONFIG_INIT_ENTRYPOINT="nsh_main"
+CONFIG_LIBC_EXECFUNCS=y
+CONFIG_MTD=y
+CONFIG_NFILE_DESCRIPTORS_PER_BLOCK=6
+CONFIG_NSH_BUILTIN_APPS=y
+CONFIG_NSH_READLINE=y
+CONFIG_NXFLAT=y
+CONFIG_RAM_SIZE=532480
+CONFIG_RAM_START=0x20000000
+CONFIG_READLINE_CMD_HISTORY=y
+CONFIG_RP23XX_FLASH_MTD=y
+CONFIG_RR_INTERVAL=200
+CONFIG_SCHED_WAITPID=y
+CONFIG_START_DAY=9
+CONFIG_START_MONTH=2
+CONFIG_START_YEAR=2021
+CONFIG_SYSLOG_CONSOLE=y
+CONFIG_SYSTEM_NSH=y
+CONFIG_SYSTEM_XIPFS=y
+CONFIG_TESTING_FS_XIPFS=y
+CONFIG_TESTING_FS_XIPFS_MTD="/dev/rpflash"
+CONFIG_UART0_SERIAL_CONSOLE=y

boards/arm/rp23xx/pimoroni-pico-2-plus/configs/xipfs/defconfig

@@ -25,7 +25,6 @@ CONFIG_DEBUG_FULLOPT=y
 CONFIG_DEBUG_SYMBOLS=y
 CONFIG_DISABLE_POSIX_TIMERS=y
 CONFIG_EXAMPLES_HELLO=y
-CONFIG_EXAMPLES_NXFLATXIP=y
 CONFIG_FS_PROCFS=y
 CONFIG_FS_PROCFS_REGISTER=y
 CONFIG_FS_XIPFS=y
@@ -36,7 +35,6 @@ CONFIG_MTD=y
 CONFIG_NFILE_DESCRIPTORS_PER_BLOCK=6
 CONFIG_NSH_BUILTIN_APPS=y
 CONFIG_NSH_READLINE=y
-CONFIG_NXFLAT=y
 CONFIG_RAM_SIZE=532480
 CONFIG_RAM_START=0x20000000
 CONFIG_READLINE_CMD_HISTORY=y

tools/ci/testlist/arm-06.dat

@@ -1,4 +1,6 @@
 /arm/r*,CONFIG_ARM_TOOLCHAIN_GNU_EABI
+# NXFLAT tools (mknxflat) are not available in the CI container
+-pimoroni-pico-2-plus:xipfs-nxflat
 
 # Boards build by CMake