linux-imx

LF-300-1 media: mipi csi: make the csi clock usecount to 0 when it's not used

Balance the clocks enable/disable to make sure clock use count is 0 when the
module is not used.
This applies for imx8mq.

Signed-off-by: Robby Cai <robby.cai@nxp.com>
Reviewed-by: Guoniu.zhou <guoniu.zhou@nxp.com>
(cherry picked from commit f7b9503f39836e6e84bd1302f3a9eeee9f87b060)