leds: Fix leds-class.c comment

led_classdev_unregister() has no "__" prefix, remove it.
Signed-off-by: Qinghuang Feng <qhfeng.kernel@gmail.com>
Signed-off-by: Richard Purdie <rpurdie@linux.intel.com>

drivers/leds/led-class.c

@@ -144,7 +144,7 @@ err_out:
 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.