drm/i915: Remove save/restore of physical HWS_PGA register
Now that we always restore the HWS registers (both physical and GTT virtual addresses) when re-initialising the rings, we can eliminate the superfluous save/restore of the register across suspend and resume. Signed-off-by: NChris Wilson <chris@chris-wilson.co.uk> Signed-off-by: NDaniel Vetter <daniel.vetter@ffwll.ch>
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