Merge branch 'drm-nouveau-fixes-3.8' of git://anongit.freedesktop.org/git/nouveau/linux-2.6 into drm-next

Fixes for one major lockdep warning, one oops reported by a few people, and
fix for a long hang on some gpu engines.

* 'drm-nouveau-fixes-3.8' of git://anongit.freedesktop.org/git/nouveau/linux-2.6:
  drm/nouveau: add lockdep annotations
  drm/nv50/fb: Fix nullptr-deref on IGPs
  drm/nouveau: use different register to wait for secret scrubber