leds/leds-s3c24xx: use devm_gpio_request

why?
because if the led_classdev_register fails we wont do gpio free
because using devm_ functions, there is no need for error paths

Signed-off-by: Devendra Naga <devendra.aaru@gmail.com>
Signed-off-by: Bryan Wu <bryan.wu@canonical.com>
1 file changed