Simplifies return value logic of adv7170_set_fmt().
Signed-off-by: NBaruch Siach <baruch@tkos.co.il>
Signed-off-by: NHans Verkuil <hans.verkuil@cisco.com>
Signed-off-by: NMauro Carvalho Chehab <mchehab@s-opensource.com>