leds: fix spelling mistake

Fix typo: "Tigger" --> "Trigger"
Signed-off-by: Flavio Suligoi <f.suligoi@asem.it>
Reviewed-by: Alexander Dahl <ada@thorsis.com>
Signed-off-by: Pavel Machek <pavel@ucw.cz>

drivers/leds/led-triggers.c

@@ -358,7 +358,7 @@ int devm_led_trigger_register(struct device *dev,
 }
 EXPORT_SYMBOL_GPL(devm_led_trigger_register);
 
-/* Simple LED Tigger Interface */
+/* Simple LED Trigger Interface */
 
 void led_trigger_event(struct led_trigger *trig,
 			enum led_brightness brightness)