media: imx219: Put usage_count correctly in s_ctrl callback

pm_runtime_get_if_in_use() returns an error if Runtime PM is disabled for
the device, in which case it won't increment the use count.
pm_runtime_put() does that unconditionally however. Only call
pm_runtime_put() in case pm_runtime_get_if_in_use() has returned a value >
0.

Signed-off-by: Sakari Ailus <sakari.ailus@linux.intel.com>
1 file changed