media: rcar-vin: Do not reset the crop and compose rectangles in s_fmt

The crop and compose rectangles are reset when s_fmt is called
resulting in potentially valid rectangles being lost when updating the
format. Fix this by mapping the rectangles inside the new format.

Signed-off-by: Niklas Söderlund <niklas.soderlund+renesas@ragnatech.se>
Reviewed-by: Kieran Bingham <kieran.bingham+renesas@ideasonboard.com>
Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>
Signed-off-by: Mauro Carvalho Chehab <mchehab+samsung@kernel.org>