disable / enable_all_steppers functions

Marlin/temperature.cpp

@@ -1051,13 +1051,7 @@ void setWatch() {
           thermal_runaway = true;
           for (;;) {
             disable_heater();
-            disable_x();
-            disable_y();
-            disable_z();
-            disable_e0();
-            disable_e1();
-            disable_e2();
-            disable_e3();
+            disable_all_steppers();
             manage_heater();
             lcd_update();
           }