media: i2c: imx219: Use subdev state to calculate binning and pixelrate

media: i2c: imx219: Use subdev state to calculate binning and pixelrate

The pixel rate and binning calculations need the format and resolution
of the sensor, so pass the v4l2 subdev state directly instead of always
operating on the active state.

Suggested-by: Jacopo Mondi <jacopo.mondi@ideasonboard.com>
Link: https://lore.kernel.org/linux-media/sejl7xskif6rlpdsg3jhczjwe5gi6rs53ehbyka6omv2zeg7qq@4iis7i2lla5p/
Reviewed-by: Jacopo Mondi <jacopo.mondi@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@xs4all.nl>