media: i2c: imx415: Use v4l2_subdev_get_fmt()

media: i2c: imx415: Use v4l2_subdev_get_fmt()

The imx415 driver uses the subdev active state, there's
no need to implement the .get_fmt() operation manually. Use
the v4l2_subdev_get_fmt() helper instead.

Signed-off-by: Umang Jain <umang.jain@ideasonboard.com>
Reviewed-by: Michael Riesch <michael.riesch@wolfvision.net>
Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Signed-off-by: Sakari Ailus <sakari.ailus@linux.intel.com>
Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>