add vidioc_enum_framesizes implementation, follow default_g_parm()
and g_mbus_fmt() method
Signed-off-by: NQing Xu <qingx@marvell.com>
Signed-off-by: NGuennadi Liakhovetski <g.liakhovetski@gmx.de>
Signed-off-by: NMauro Carvalho Chehab <mchehab@redhat.com>