can: add combined rx/tx LED trigger support

Add <ifname>-rxtx trigger, that will be activated both for tx
as rx events. This trigger mimics "activity" LED for Ethernet
devices.

Signed-off-by: Yegor Yefremov <yegorslists@googlemail.com>
Signed-off-by: Marc Kleine-Budde <mkl@pengutronix.de>
diff --git a/include/linux/can/dev.h b/include/linux/can/dev.h
index c05ff0f..c3a9c8f 100644
--- a/include/linux/can/dev.h
+++ b/include/linux/can/dev.h
@@ -61,6 +61,8 @@
 	char tx_led_trig_name[CAN_LED_NAME_SZ];
 	struct led_trigger *rx_led_trig;
 	char rx_led_trig_name[CAN_LED_NAME_SZ];
+	struct led_trigger *rxtx_led_trig;
+	char rxtx_led_trig_name[CAN_LED_NAME_SZ];
 #endif
 };