media: rcar-vin: Enable media-graph on Gen2

media: rcar-vin: Enable media-graph on Gen2

Complete the conversion from soc_camera to a full fledge media
controller enabled devices for all supported generations of the device.
All work is already done as this is already supported on Gen3, and
later.

All that is missing is removing all special cases for the non
media-graph call paths and use the common ones in their place.

The one change that stands out is dropping the doubling of the height in
the Gen2 scaler setup, rvin_scaler_gen2(). In the Gen2 non-MC world the
VIN size was set to match the video source subdevices, and if that was a
TOP/BOTTOM video source it needed to be doubled for the scaler to
function properly. In the MC world this is now handled by user-space
configuration of the pipeline and the adjustment is not needed.

Mark the completion of converting from soc_camera by injecting an
attribution of myself in the header.

Signed-off-by: Niklas Söderlund <niklas.soderlund+renesas@ragnatech.se>
Reviewed-by: Laurent Pinchart <laurent.pinchart+renesas@ideasonboard.com>
Link: https://lore.kernel.org/r/20250613153434.2001800-13-niklas.soderlund+renesas@ragnatech.se
Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Signed-off-by: Hans Verkuil <hverkuil@xs4all.nl>