M503 patch for EEPROM_CHITCHAT off

Fix #9155

Marlin/src/gcode/eeprom/M500-M504.cpp

    */
   void GcodeSuite::M503() {
     (void)settings.report(parser.seen('S') && !parser.value_bool()
-      #if NUM_SERIAL > 1
+      #if ADD_PORT_ARG
         , command_queue_port[cmd_queue_index_r]
       #endif
     );