cpufreq: remove scaling_available_freqs as it is already in the cpu_undervolting module

Conflicts:
	arch/arm/mach-exynos/cpufreq.c
arm: auto_hotplug: add max_online_cpus feature
https://github.com/mathkid95/linux_lg_kitkat/commit/9f913bc150f0bb36152343cc994cbc65f866fa8f
stweaks: add cpu hotplug control