linux-imx

LF-300-2 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 imx8mm, imx7d.

Signed-off-by: Robby Cai <robby.cai@nxp.com>
Reviewed-by: Guoniu.zhou <guoniu.zhou@nxp.com>
(cherry picked from commit c2e8e77015a69955541152f4942fa6ff58fbe4cd)