[PATCH] V4L/DVB (3181): Enable SPDIF output for DVB-S rev 2.3

- Enable SPDIF output for DVB-S rev 2.3. Firmware 2623 or higher required.

Signed-off-by: Oliver Endriss <o.endriss@gmx.de>
Signed-off-by: Mauro Carvalho Chehab <mchehab@brturbo.com.br>