cpufreq: Add snapshot of qcom-cpufreq driver

This is a snapshot of qcom-cpufreq as of msm-3.10 commit
Commit acdce027751d (Merge "defconfig: arm64: Enable
ONESHOT_SYNC for msm8994").

Change-Id: Idb99a856330566ffad6309c48edabb220cee7917
Signed-off-by: Stephen Boyd <sboyd@codeaurora.org>
[junjiew@codeaurora.org: resolved conflicts in Kconfig.arm and Makefile. Dropped dependency on ARCH_MSM.]
Signed-off-by: Junjie Wu <junjiew@codeaurora.org>
Signed-off-by: Rohit Gupta <rohgup@codeaurora.org>
[dkeitel@codeaurora.org: skip frequencies that round to same rate]
Signed-off-by: David Keitel <dkeitel@codeaurora.org>
[gsantosh@codeaurora.org: adapt to opensource clock framework]
Signed-off-by: Santosh Mardi <gsantosh@codeaurora.org>
[pkondeti@codeaurora.org: Remove superfluous NULL]
Signed-off-by: Pavankumar Kondeti <pkondeti@codeaurora.org>
[avilaj@codeaurora.org: move documentation to separate patch]
Signed-off-by: Jonathan Avila <avilaj@codeaurora.org>