sonixb:   640x480 mode for sn9c103 - ov7630.
Signed-off-by: NAndoni Zubimendi <andoni.zubimendi@gmail.com>
Signed-off-by: NJean-Francois Moine <moinejf@free.fr>
Signed-off-by: NMauro Carvalho Chehab <mchehab@infradead.org>