Merge branch 'linux-4.3' of git://anongit.freedesktop.org/nouveau/linux-2.6 into drm-fixes

Just one fix from Ilia to resolve various issues that have resulted from
buffer eviction.

* 'linux-4.3' of git://anongit.freedesktop.org/nouveau/linux-2.6:
  drm/nouveau/gem: return only valid domain when there's only one