CA0106 driver
This fixes a bug whereby when the snd-ca0106 module first loads,
alsamixer says 'SPDIF Out [Off]' but no analog sound comes from the speakers.
This covers any bug reports that said things like
'mixer fails to remember analog output on, when the system is rebooted.'
Signed-off-by: James Courtier-Dutton <James@superbug.co.uk>