[git pull] drm fixes

[Dave Airlie]

> gma500 build fix + some regression fixes for nouveau/radeon, along with
> one radeon patch that was posted a while ago and I missed and it also required
> rebasing around some other stuff.

I've added one more commit to this.

commit d936622c36273a9ecfbb4aacf26cd29405995159
Author: Michel Dänzer <michel.daenzer at amd.com>
Date:   Wed Mar 28 08:52:32 2012 +0200

    drm/radeon: Only warn if the intra-domain offset actually exceeds the limit.

it had 3 reports/tests.

Dave.