spdif device depends now on the given subdevice
was hardcoded to hw:0,2 before
fixed opt-parsing for hw:x,y like opts
seperated initialization of spdif from common init as it was
probably intended before
git-svn-id: svn://svn.mplayerhq.hu/mplayer/trunk@6703 b3059339-0415-0410-9bf9-f77b7e298cf2