V4L/DVB (7249): Fix advertised pixel formats in mt9m001 and mt9v022

Only advertise pixel formats, that we actually can support in the
present configuration.

Signed-off-by: Guennadi Liakhovetski <g.liakhovetski@pengutronix.de>
Signed-off-by: Mauro Carvalho Chehab <mchehab@infradead.org>