quectel: Set URC port to uart1 on EC21

Set the URC port of the Quectel EC21 to uart1 when it is used through
it's serial port. This setting is saved to non-volatile storage by the
modem automatically.

plugins/quectel.c

@@ -773,10 +773,12 @@ static void setup_aux(struct ofono_modem *modem)
 
 	g_at_chat_set_slave(data->modem, data->aux);
 
-	if (data->model == QUECTEL_EC21)
+	if (data->model == QUECTEL_EC21) {
 		g_at_chat_send(data->aux, "ATE0; &C0; +CMEE=1", none_prefix,
 				NULL, NULL, NULL);
-	else
+		g_at_chat_send(data->aux, "AT+QURCCFG=\"urcport\",\"uart1\"", none_prefix,
+				NULL, NULL, NULL);
+	} else
 		g_at_chat_send(data->aux, "ATE0; &C0; +CMEE=1; +QIURC=0",
 				none_prefix, NULL, NULL, NULL);