leds: Fix leds-class.c comment

led_classdev_unregister() has no "__" prefix, remove it.

Signed-off-by: Qinghuang Feng <[e-mail]>
Signed-off-by: Richard Purdie <[e-mail]>

drivers/leds/led-class.c

···
 EXPORT_SYMBOL_GPL(led_classdev_register);
 
 /**
- * __led_classdev_unregister - unregisters a object of led_properties class.
+ * led_classdev_unregister - unregisters a object of led_properties class.
  * @led_cdev: the led device to unregister
  *
  * Unregisters a previously registered via led_classdev_register object.