[PPC,SOUND] Fix audio gpio state detection

[Olaf Hering]

 On Wed, Mar 01, Ben Collins wrote:

> 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).

Can you make individual patches, each one fixing one thing, going from A
to B.  You know that hch song...