[media] media: adv7180: fill in mbus format in set_fmt

If the V4L2_SUBDEV_FORMAT_TRY is used in set_fmt the width, height etc
would not be filled.

Signed-off-by: Niklas Söderlund <niklas.soderlund+renesas@ragnatech.se>
Signed-off-by: Hans Verkuil <hans.verkuil@cisco.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>