leds/leds-s3c24xx: use devm_gpio_request
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 <97fdf9fb34d40445b99f4e064a18057cd6e2bccb@gmail.com>
Signed-off-by: Bryan Wu <465f0e91e61585f5bc1128e7fe63296c33a56926@canonical.com>

KristFoundation/Programs,TeamVee-Kanas/android_kernel_samsung_kanas,KristFoundation/Programs,TeamVee-Kanas/android_kernel_samsung_kanas,KristFoundation/Programs,TeamVee-Kanas/android_kernel_samsung_kanas,TeamVee-Kanas/android_kernel_samsung_kanas,KristFoundation/Programs,KristFoundation/Programs,KristFoundation/Programs,TeamVee-Kanas/android_kernel_samsung_kanas