msm: clock-krait-8974: User voltage control for msm-cpufreq device

Conflicts:
	arch/arm/mach-msm/clock-krait-8974.c
	arch/arm/mach-msm/cpufreq.c

Change-Id: Icf6c59bda69329c1aa9e986dd288946ff1502a64
arm/dts: msm8974: Add frequency steps up to 2.88GHz

Conflicts:
	arch/arm/boot/dts/msm8974.dtsi

Change-Id: Ic406984254b506e59313652f613108dfd7b3dcb5
Defconfig: enable User voltage control for msm-cpufreq device

Change-Id: Ief2bd82e93bff7bfa2b334fcfbe7f3025d6d90ab