media: staging: rkisp1: rsz: return to userspace the crop value in bayer mainpath

If bayer format is set in mainpath, then crop is not supported.
The core was just resetting crop but wasn't returning the values back to
user space.

Return values taken in consideration by the driver to userpace.

Signed-off-by: Helen Koike <helen.koike@collabora.com>
Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>
Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>