Revert "smdk4412: Notification LED controls"

This reverts commit fb3cb54068bbebd2daf205ca8da364865c1a2bc2.
leds-an30259a: Blinking control

Conflicts:

	drivers/leds/leds-an30259a.c
led-control: Aquire brightness, drop blink rate control from user-space
led-control: Correct colour scaling and user lowpower

Correctly scale the display colour depending on configured brightness, which
is now also updated in userspace depending on Samsung's brightness detection.