DVB (2440): Fixed mpeg audio on spdif from Nexus-CA card (rev 2.3),

- Fixed mpeg audio on spdif from Nexus-CA card (rev 2.3),
definitions for sound chip MSP3415

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