chore: move led shutdown logic in rgb_matric.c

quantum/rgb_matrix.c

@@ -436,6 +436,9 @@ void rgb_matrix_init(void) {
 }
 
 void rgb_matrix_set_suspend_state(bool state) {
+  if (state && RGB_DISABLE_WHEN_USB_SUSPENDED) {
+    rgb_matrix_set_color_all(0, 0, 0);
+  }
   g_suspend_state = state;
 }