[coreboot] Only UDMA/33 PATA on m57sli, UDMA/66 with factory BIOS

[Peter Stuge]

Harald Gutmann wrote:
> > * hda: UDMA/33 compared to UDMA/66 with prop. BIOS
>
> My suggestion would be to open up a new ML-thread according to this
> problem.

Good idea.
> It should be "easy" to fix, and I think that it has nothing to do
> with the DMA modes itself, but with the "88pin-wire-cable-bit"

Yep.
> (but I don't know if it's for real a bit which needs to be set).

Usually there is.
> I also tried to investigate that problem, but ran out of time the
> evening I started. (check kernel ide-drivers amd7xxx.c (or similar)
> to find out what's going on there).

I hope the bit we want isn't hidden in a chipset doc which we can't
find. :\

//Peter