[coreboot] PCI config

[Myles Watson]

> > How should we really fix it?  In v3 didn't we just scrap type 2
> > accesses all together?
> We can keep the type 2 support code, but the auto detection at run time
> makes absolutely no sense.
> 
> I sent a patch for this some days ago, but I think Carl-Daniel didn't
> have too much success with it on his board.
Maybe we could simplify it a little and try again.  It looks like the rs690
changes were pretty extensive.

Thanks,
Myles