[Intel-gfx] [PATCH] drm/i915: Remove unneeded struct_mutex around rpm

[Szwichtenberg, Radoslaw]

On Sat, 2017-02-18 at 15:00 +0000, Chris Wilson wrote:
> We don't need struct_mutex for acquiring an rpm wakeref, and do not need
> to serialise those register read (it's the wrong mutex for those
> registers in any case). Begone!
> 
> Signed-off-by: Chris Wilson <chris at chris-wilson.co.uk>
Reviewed-by: Radoslaw Szwichtenberg <radoslaw.szwichtenberg at intel.com>