msm: dcvs: Add 'msm-dcvs' cpufreq governor
The 'msm-dcvs' CPUFreq governor interfaces the msm_dcvs driver frequency
change requests with the CPUFreq framework.

Change-Id: I950e5b09f568412760d9b022f59f208c6bcb54ce
Signed-off-by: Praveen Chidambaram <pchidamb@codeaurora.org>
adapted and modified for 8660 targets by faux123

https://github.com/faux123/msm8660-htc-ics/commit/898f5bade4d2b6c52d4b8dbf21fbe010d49542fd