cpufreq: bulk merge of a dozen cpu governors + skeleton for dynamic voltage control

Conflicts:
	drivers/cpufreq/Kconfig
	drivers/cpufreq/Makefile
	drivers/cpufreq/cpufreq.c
	drivers/cpufreq/cpufreq_interactivex.c
	drivers/cpufreq/cpufreq_savagedzen.c
	drivers/cpufreq/cpufreq_smartass2.c
preparation to cherry-pick
undervolt: add VDD sysfs interface for configuring the voltage levels

Conflicts:
	arch/arm/mach-msm/acpuclock.c
enable voltage control interface
fix compilation after add vdd sysfs interface