merge ktrace-lwp.

ansify and KNF

- ANSIfy
- remove some trailing spaces/tabs
- minor style nits

Multichannel output still doesn't work, but while working on it, I repaired
the double buffering code, and setting a couple of other parameters works now.

Add RCS ids, and clean up some unused in newstyle audio hardware drivers
functions.

Amiga custom chip audio hardware driver, by Stefan Thesing
(thesing@cs.uni-sb.de), heavily hacked upon by me to
- make it work with -current audio system
- make it shut off Amiga audio DMA only at ap

Amiga custom chip audio hardware driver, by Stefan Thesing
(thesing@cs.uni-sb.de), heavily hacked upon by me to
- make it work with -current audio system
- make it shut off Amiga audio DMA only at appropriate places.
XXX A couple of bugs still remain, which well be handled later.
XXX Among them: only mono output; doesn't refuse to handle input, but chokes;
will not play last millichunk (is this 20 ms?) of data.

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