Reset after kill with a button on the KILL_PIN (#13091)

Marlin/src/Marlin.cpp

@@ -764,11 +764,34 @@ void minkill() {
     suicide();
   #endif
 
-  while (1) {
+  #if HAS_KILL
+
+    // Wait for kill to be released
+    while (!READ(KILL_PIN)) {
+      #if ENABLED(USE_WATCHDOG)
+        watchdog_reset();
+      #endif
+    }
+
+    // Wait for kill to be pressed
+    while (READ(KILL_PIN)) {
+      #if ENABLED(USE_WATCHDOG)
+        watchdog_reset();
+      #endif
+    }
+
+    void(*resetFunc)(void) = 0; // Declare resetFunc() at address 0
+    resetFunc();                // Jump to address 0
+
+  #else // !HAS_KILL
+
+    for (;;) {
       #if ENABLED(USE_WATCHDOG)
         watchdog_reset();
       #endif
     } // Wait for reset
+
+  #endif // !HAS_KILL
 }
 
 /**