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

Signed-off-by: Jean Francis Dominique S. Mabalot <jfdsmabalot@redhat.com>

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

Change-Id: I3bd78eb7519daf4c12f9a21df38274e13ff560e1