Patch to init W with RGBW_LED

Marlin/Marlin_main.cpp

     OUT_WRITE(STAT_LED_BLUE_PIN, LOW); // turn it off
   #endif
 
-  #if ENABLED(RGB_LED)
+  #if ENABLED(RGB_LED) || ENABLED(RGBW_LED)
     SET_OUTPUT(RGB_LED_R_PIN);
     SET_OUTPUT(RGB_LED_G_PIN);
     SET_OUTPUT(RGB_LED_B_PIN);
+    #if ENABLED(RGBW_LED)
+      SET_OUTPUT(RGB_LED_W_PIN);
+    #endif
   #endif
 
   lcd_init();