Sound on Dell D600 laptop

[Li, Qing]

	Thanks all. 

> 
> snd_ich_load="YES"
> 

	I don't have the above, wasn't quite sure which one
	to load because it's a SigmaTel, though 
	/usr/src/sys/dev/sound/pcm/ac97.c appears to include it.

	I'll give it a try.

	Thanks again.

	-- Qing