Merge branch 'vmwgfx-fixes-4.3' of git://people.freedesktop.org/~thomash/linux

I'm not sure whether this patch comes in too late, but it would be good to
have it in. It stabilizes command submission in case of command buffer errors.

* 'vmwgfx-fixes-4.3' of git://people.freedesktop.org/~thomash/linux:
  drm/vmwgfx: Stabilize the command buffer submission code