Add voltage control to defconfig

Change-Id: I7773eb13b81b732161f0f2e9849479e9a2748e06
msm: clock-krait-8974: User voltage control for msm-cpufreq device

Change-Id: Ic02efb28e15094944515a82a9a4c209d45e4d8cc
Signed-off-by: flar2 <asegaert@gmail.com>
Merge changes Ic02efb28,I7773eb13 into du44

* changes:
  msm: clock-krait-8974: User voltage control for msm-cpufreq device
  Add voltage control to defconfig