Recent regression of ALC655 on VIA

[R CHAN <rspchan@starhub.net.sg>]

Hi, recent Alsa changes (ac97_patch.c) seem to have broken my
ALC655 ac97 codec on via82xx. The breakage happened around 2.6.5.

Specifically, I can no longer set

Mic As Center/LFE control

Unlike Line-In As Surround it is now reported
as a volume control with Mono values from 0-0.
Can't set that bit at all.

Secondly, I can't get 5.1 sound at all - though
duplicate front does work.

Previously, I tested surround and center/lfe using the following
plugs. I was able to test them as stereo pairs - now I can't get
sound using them at. Any suggestions?

#setup 5.1 device using hw:0,1
#Device 0 is stereo
#Device 1 is 5.1
pcm.via51
{
	type plug;
	slave {
		pcm "hw:0,1";
		channels 6;
		rate 48000;
	}
}

#Streams 2,3 = surround speakers
pcm.via23
{
	type plug;
	slave via51;
	ttable.2.0 1;
	ttable.3.1 1;
}

#Streams 4,5 = center/lfe speakers
pcm.via45
{
	type plug;
	slave via51;
	ttable.4.0 1;
	ttable.5.1 1;
	
}








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