clk: qcom: Add camera clock driver for SM6150

Add support for camera clock controller found on SM6150
based devices. This would allow camera device drivers
to probe and control their clocks.

Change-Id: Ic5b5e6e9363f0272e777c500028f876f3e79a7b8
Signed-off-by: Veera Vegivada <vvegivad@codeaurora.org>