Watchdog cleanup (#15283)

Marlin/src/HAL/HAL_STM32F1/watchdog.cpp

@@ -33,7 +33,7 @@
 #include <libmaple/iwdg.h>
 #include "watchdog.h"
 
-void watchdog_reset() {
+void HAL_watchdog_refresh() {
   #if DISABLED(PINS_DEBUGGING) && PIN_EXISTS(LED)
     TOGGLE(LED_PIN);  // heartbeat indicator
   #endif

Marlin/src/HAL/HAL_STM32F1/watchdog.h

@@ -41,4 +41,4 @@ void watchdog_init();
 
 // Reset watchdog. MUST be called at least every 4 seconds after the
 // first watchdog_init or STM32F1 will reset.
-void watchdog_reset();
+void HAL_watchdog_refresh();