clk: qcom: Add sensor clock controller driver for SM6150

Add a sensor clock controller (SCC) driver which can be used
to control sensor clocks on boards in which the application
processor owns these clocks.

Change-Id: I58fcd674215840bc121730132ee1e5d9bb7d648c
Signed-off-by: Odelu Kukatla <okukatla@codeaurora.org>