♻️ Move watchdog to MarlinHAL

Marlin/src/HAL/SAMD51/HAL.h

@@ -26,7 +26,6 @@
 #include "../shared/math_32bit.h"
 #include "../shared/HAL_SPI.h"
 #include "fastio.h"
-#include "watchdog.h"
 
 #ifdef ADAFRUIT_GRAND_CENTRAL_M4
   #include "MarlinSerial_AGCM4.h"
@@ -157,6 +156,10 @@ public:
   // Earliest possible init, before setup()
   MarlinHAL() {}
 
+  // Watchdog
+  static void watchdog_init()    IF_DISABLED(USE_WATCHDOG, {});
+  static void watchdog_refresh() IF_DISABLED(USE_WATCHDOG, {});
+
   static void init();          // Called early in setup()
   static void init_board() {}  // Called less early in setup()
   static void reboot();        // Restart the firmware from 0x0