media: zoran: disable output

Zoran is picky about jpeg data it accepts. At least it seems to not support COM and APPn.
So until a way to filter data will be done, disable output.

Signed-off-by: Corentin Labbe <clabbe@baylibre.com>
Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>
Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>