V4L/DVB (4987): Improve cx2341x documentation

Document the program index table format, removed unused interrupt documentation
and improve the documentation regarding the audio mode (stereo/joint/dual/mono).

Signed-off-by: Hans Verkuil <hverkuil@xs4all.nl>
Signed-off-by: Mauro Carvalho Chehab <mchehab@infradead.org>
3 files changed