[PPC,SOUND] Fix audio gpio state detection

[Ben Collins]

On Thu, 2006-03-02 at 10:09 +1100, Benjamin Herrenschmidt wrote:
> > > This (sort of) breaks PowerMac3,4 (69 (PowerMac G4 Silver)). I have to
> > > force it on up to now, but with this patch the internal speaker will not
> > > work with or without my patch to force it on.
> > 
> > But the patch fixes also my PowerBook4,1, I dont have to toggle the headphone
> > once to get the built-in speakers enabled.
> > Looks like 2.6.16 stuff, but its been broken for so long now...
> 
> What is the status of Ben's latest stuff ?

I'm rediffing now. However, I may not include my tumbler changes
immediately. For some reason, those are the ones causing problems. I
need to review the diff and see if I can find the problem (which I
cannot reproduce).

The toonie stuff is great. Been working really well for all the folks
I've heard from, and for me on my PowerBook5,9.

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