Revert "Revert "Revert "Revert "leds-an30259a: Blinking control""""

This reverts commit 3fa5e1dc5abbad2ce58d46825be3ed68259ce26d.
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.
Add Adaptive Body Bias control

Conflicts:

	arch/arm/mach-exynos/Kconfig
abb-control: Fix offset in slice lookup