leds: lp55xx-common: fix sysfs entry leak

Make sure the sysfs group is removed when the LEDs are unregistered.

Signed-off-by: Johan Hovold <johan@kernel.org>
Signed-off-by: Bryan Wu <cooloney@gmail.com>
diff --git a/drivers/leds/leds-lp55xx-common.c b/drivers/leds/leds-lp55xx-common.c
index 88317b4..3fbfb31 100644
--- a/drivers/leds/leds-lp55xx-common.c
+++ b/drivers/leds/leds-lp55xx-common.c
@@ -520,6 +520,8 @@
 
 	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);
 	}