Merge branch 'linux-4.2' of git://anongit.freedesktop.org/git/nouveau/linux-2.6 into drm-fixes

Two more nouveau fixes.

* 'linux-4.2' of git://anongit.freedesktop.org/git/nouveau/linux-2.6:
  drm/nouveau/nouveau/ttm: fix tiled system memory with Maxwell
  drm/nouveau/kms/nv50-: guard against enabling cursor on disabled heads