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

Change-Id: I9900aa02e6167b0caf473b47db9af2e8f42e1518
Revert "msm: kgsl: Report GPU frequency correctly in sysfs"

This reverts commit 0dfaa201a81b67f7c20834e25ebeb0bbff3d9eaf.