Added voltage control

vdd: voltage control: implemented voltage control

Conflicts:
	arch/arm/mach-msm/acpuclock-8x60.c
	arch/arm/mach-msm/include/mach/rpm-8660.h

vdd: cpufreq: build error fix

Conflicts:
	arch/arm/mach-msm/acpuclock-8x60.c
	drivers/cpufreq/Kconfig