leds: Add ability to blink via simple trigger

As blink API is now available, it's possible to add ability to blink via
simple trigger.

Signed-off-by: Vasily Khoruzhick <anarsoul@gmail.com>
Signed-off-by: Anton Vorontsov <cbouatmailru@gmail.com>
diff --git a/include/linux/leds.h b/include/linux/leds.h
index 0f19df9..ffd5c3d 100644
--- a/include/linux/leds.h
+++ b/include/linux/leds.h
@@ -145,6 +145,9 @@
 extern void led_trigger_unregister_simple(struct led_trigger *trigger);
 extern void led_trigger_event(struct led_trigger *trigger,
 				enum led_brightness event);
+extern void led_trigger_blink(struct led_trigger *trigger,
+			      unsigned long *delay_on,
+			      unsigned long *delay_off);
 
 #else