media: zoran: move to mainline

The zoran driver can be moved back to mainline after it has been
converted by Corentin Labbe to vb2.

Note that the zoran driver no longer supports video output, but
video capture is working fine now.

Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>
Signed-off-by: Mauro Carvalho Chehab <mchehab@kernel.org>