msm: sensor: fixing errors due to csiphy clock release

csiphy clock being released during initialization even
in success case due to which enabling clk returns error,
so fixed to release only whene there is a failure in other
functionality.

Change-Id: I9a7618850e45bd78f74fb2833932e3f4fd776392
Signed-off-by: Sureshnaidu Laveti <lsuresh@codeaurora.org>