clk: qcom: Add snapshot of OSM CPU clock driver

This is a snapshot of the OSM clock driver as of msm-4.4
'commit 38833d66 ("clk: msm: clock-osm: Request Nominal Fmax frequency
after OSM enable")'

Fix warnings for of_device_id and return from void function.

Change-Id: I242158975f212426268fd6eaf45378826d56d094
Signed-off-by: Taniya Das <tdas@codeaurora.org>