Merge branch 'linux-3.18' of git://anongit.freedesktop.org/git/nouveau/linux-2.6 into drm-fixes

two nouveau fixes.

* 'linux-3.18' of git://anongit.freedesktop.org/git/nouveau/linux-2.6:
  drm/nouveau: fix regression on agp boards
  drm/gt215/gr: fix initialisation on gddr5 boards