Clean up some HAL code

Marlin/src/HAL/HAL_AVR/watchdog_AVR.cpp

@@ -22,12 +22,14 @@
 
 #ifdef ARDUINO_ARCH_AVR
 
-#include "../../../Marlin.h"
+#include "../../../MarlinConfig.h"
 
 #if ENABLED(USE_WATCHDOG)
 
 #include "watchdog_AVR.h"
 
+#include "../../../Marlin.h"
+
 // Initialize watchdog with a 4 sec interrupt time
 void watchdog_init() {
   #if ENABLED(WATCHDOG_RESET_MANUAL)

Marlin/src/HAL/HAL_AVR/watchdog_AVR.h

@@ -23,8 +23,6 @@
 #ifndef WATCHDOG_AVR_H
 #define WATCHDOG_AVR_H
 
-//#include "../../../Marlin.h"
-
 #include <avr/wdt.h>
 
 // Initialize watchdog with a 4 second interrupt time
@@ -34,4 +32,4 @@ void watchdog_init();
 // first watchdog_init or AVR will go into emergency procedures.
 inline void watchdog_reset() { wdt_reset(); }
 
-#endif
+#endif // WATCHDOG_AVR_H