linux-phytec-fsl

leds: gpio: switch to managed version of led_classdev_register

Using the managed version of led_classdev_register allows to
significantly simplify the code.

Signed-off-by: Heiner Kallweit <hkallweit1@gmail.com>
Signed-off-by: Jacek Anaszewski <j.anaszewski@samsung.com>