[media] V4L: sh_mobile_ceu_camera: maximum image size depends on the hardware version

Newer CEU versions, e.g., the one, used on sh7372, support image sizes
larger than 2560x1920. Retrieve maximum sizes from platform properties.

Signed-off-by: Guennadi Liakhovetski <g.liakhovetski@gmx.de>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>