drm/i915: Change HSW WIZ hashing mode to 16x4
BSpec recommends using 8x4 hashing mode when MSAA is used. But in practice 16x4 seems to have a slight edge in performance (on IVB and HSW at least). So just use 16x4. Signed-off-by: NVille Syrjälä <ville.syrjala@linux.intel.com> Reviewed-by: NAntti Koskipää <antti.koskipaa@linux.intel.com> Signed-off-by: NDaniel Vetter <daniel.vetter@ffwll.ch>
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