- Added few more Intel HDA ids (ICH 6/7) which does have backward   compatible AC97 codec. - As the driver supports so many variants, create a table ids for   ease of probing and maintenance.   Submitted by:		yongari   Reviewed/Tested by:	multimedia@ - From luigi: 	The code to compute fragment sizes in the ich driver almost 	invariably ends up using the full buffer available, no matter 	how the user specifies fragment size and number. 	With audio telephony (8khz, 16bit-stereo) and the 16k buffer 	size this results in an unbearable 500ms delay. 	This patch makes sure that we never use more than 4 fragments, 	(i don't think we need more unless there are huge interrupt 	servicing latencies), and obey to the requested fragment size, 	so that latency is acceptable.   Based on this (and after much regression tests), I can conclude   that this driver works best with 2 fragments, thus solving various   long standing issues of ICH driver not capable to flush or play   short files perfectly.   Suggested by:		luigi (the idea of smaller fragments) - MPSAFE conversion.
- Added few more Intel HDA ids (ICH 6/7) which does have backward
  compatible AC97 codec.
- As the driver supports so many variants, create a table ids for
  ease of probing and maintenance.
  Submitted by:		yongari
  Reviewed/Tested by:	multimedia@
- From luigi:
	The code to compute fragment sizes in the ich driver almost
	invariably ends up using the full buffer available, no matter
	how the user specifies fragment size and number.
	With audio telephony (8khz, 16bit-stereo) and the 16k buffer
	size this results in an unbearable 500ms delay.
	This patch makes sure that we never use more than 4 fragments,
	(i don't think we need more unless there are huge interrupt
	servicing latencies), and obey to the requested fragment size,
	so that latency is acceptable.
  Based on this (and after much regression tests), I can conclude
  that this driver works best with 2 fragments, thus solving various
  long standing issues of ICH driver not capable to flush or play
  short files perfectly.
  Suggested by:		luigi (the idea of smaller fragments)
- MPSAFE conversion.

Approved by:	netchild (mentor)

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