leds: lp55xx-common: fix sysfs entry leak

Make sure the sysfs group is removed when the LEDs are unregistered.
Signed-off-by: NJohan Hovold <johan@kernel.org>
Signed-off-by: NBryan Wu <cooloney@gmail.com>

drivers/leds/leds-lp55xx-common.c

@@ -520,6 +520,8 @@ void lp55xx_unregister_leds(struct lp55xx_led *led, struct lp55xx_chip *chip)
 
 	for (i = 0; i < chip->num_leds; i++) {
 		each = led + i;
+		sysfs_remove_group(&each->cdev.dev->kobj,
+						&lp55xx_led_attr_group);
 		led_classdev_unregister(&each->cdev);
 		flush_work(&each->brightness_work);
 	}