* The AtomBIOS timeout fix has made my DP bridge
stop working
* The current DisplayPort code is a little lacking
on DP link training... I think thats the cause.
* This puts the first steps towards DP training
in place.
* I plan on trying to make some of this DP stuff
common accelerant stuff after it works.
* I'd rather this be common code, but I don't have access
to the DisplayPort specifications. If I added it as common
code I would want to be 100% it was complete and variables
were named properly.
* For now putting in radeon_hd private headers
