[Intel-gfx] VT switchless resume patches

[Jesse Barnes]

Had to fix up a few things:
  - LVDS blind restore from old suspend/resume code
  - cursor restore
  - sprite restore

Plus a couple of misc patches.  Enough to make things work in X, though
our handling of sprites still needs improvement; I think our watermarks
are programmed out of order even though the state seems to be getting
restored correctly.

Thanks,
Jesse