arch/tricore: disable CPU and system watchdogs during startup

Some Aurix Boot-FW configurations leave watchdogs enabled by default,
which can cause unexpected resets during early bring-up. This change
explicitly disables the CPU and system watchdogs during core0 startup to
ensure reliable system initialization.

- For TC3XX chips, call `IfxScuWdt_disableCpuWatchdog()` and
  `IfxScuWdt_disableSafetyWatchdog()`.
- For TC4XX chips, call `IfxWtu_disableCpuWatchdog()` and
  `IfxWtu_disableSystemWatchdog()`.

This is a low-risk startup change and does not alter watchdog behavior
after system initialization.

Signed-off-by: yukangzhi <yukangzhi@xiaomi.com>

arch/tricore/src/common/tricore_main.c

@@ -28,8 +28,8 @@
 #include <nuttx/init.h>
 
 #include "Ifx_Types.h"
-#include "IfxScuWdt.h"
 #include "IfxCpu.h"
+#include "IfxScuWdt.h"
 
 /****************************************************************************
  * Private Functions
@@ -43,9 +43,6 @@ static void core_main(void)
    * Enable the watchdogs and service them periodically if it is required
    */
 
-  IfxScuWdt_disableCpuWatchdog(IfxScuWdt_getCpuWatchdogPassword());
-  IfxScuWdt_disableSafetyWatchdog(IfxScuWdt_getSafetyWatchdogPassword());
-
   /* Wait for CPU sync event */
 
   IfxCpu_emitEvent(&g_sync_event);
@@ -66,6 +63,19 @@ static void core_main(void)
 
 void core0_main(void)
 {
+  /* All WDTs except WDTCPU0 and system watchdog WDTSYS are in
+   * disabled mode after Boot-FW execution. Disable the watchdog
+   * to ensure the normal startup of the system.
+   */
+
+#if defined(CONFIG_ARCH_CHIP_AURIX_TC3XX)
+  IfxScuWdt_disableCpuWatchdog(IfxScuWdt_getCpuWatchdogPassword());
+  IfxScuWdt_disableSafetyWatchdog(IfxScuWdt_getSafetyWatchdogPassword());
+#elif defined(CONFIG_ARCH_CHIP_AURIX_TC4XX)
+  IfxWtu_disableCpuWatchdog(IfxWtu_getCpuWatchdogPassword());
+  IfxWtu_disableSystemWatchdog(IfxWtu_getSystemWatchdogPassword());
+#endif
+
   core_main();
 }