media: imx355: Use subdev active state

media: imx355: Use subdev active state

Port the driver to use the subdev active state. This simplifies locking,
and makes it easier to support different crop sizes for binned modes, by
storing the crop rectangle inside the subdev state.

Reviewed-by: Kieran Bingham <kieran.bingham@ideasonboard.com>
Signed-off-by: Jai Luthra <jai.luthra@ideasonboard.com>
Signed-off-by: Sakari Ailus <sakari.ailus@linux.intel.com>
Signed-off-by: Hans Verkuil <hverkuil+cisco@kernel.org>