liblights: exynos4210: fix button off value

since we're writing to the command interface the correct values are:

1 - on
2 - off

Change-Id: I4e61b0eedd1dcfba32319b26cd9e29202f66fcaa
samsung: hardware: add support for adaptive backlight

Change-Id: I59b798e9cac2cf2c6efbe31736d3361f05c81398
Merge "samsung: hardware: add support for adaptive backlight" into cm-10.2
Merge branch 'cm-10.2' of github.com:CyanogenMod/android_hardware_samsung into cm-10.2

Conflicts:
	exynos4/exynos4210/liblights/lights.c

Change-Id: I890398b5e42dd80a1120043a25b7e55eaf56e839