Add abyssplug governor, enable it and set as default

Signed-off-by: zwliew <zhaoweiliew@gmail.com>

Conflicts:
	arch/arm/configs/cyanogenmod_i8160_defconfig
	drivers/cpufreq/Makefile

Change-Id: I1449cb01cd4ee51c6ebfdb1016e136c6c56d99ec