If *nplanes is not zero, it should use the requested size if valid
Signed-off-by: NHelen Koike <helen.koike@collabora.co.uk>
Signed-off-by: NHans Verkuil <hans.verkuil@cisco.com>
Signed-off-by: NMauro Carvalho Chehab <mchehab@s-opensource.com>