V4L/DVB (3191): Fix CC output

- CC data was swapped the wrong way around.
- Enabling CC disabled XDS and vice versa: these two should
be independent from one another.

Signed-off-by: Hans Verkuil <hverkuil@xs4all.nl>
Signed-off-by: Mauro Carvalho Chehab <mchehab@brturbo.com.br>