drm/i915: Transform WaDisablePooledEuLoadBalancingFix into a simple register write

FF_SLICE_CS_CHICKEN2 does not belong to the context image.

Cc: Chris Wilson <chris@chris-wilson.co.uk>
Cc: Mika Kuoppala <mika.kuoppala@intel.com>
Cc: Rodrigo Vivi <rodrigo.vivi@intel.com>
Signed-off-by: NOscar Mateo <oscar.mateo@intel.com>
Reviewed-by: NMichał Winiarski <michal.winiarski@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/1504798809-5653-6-git-send-email-oscar.mateo@intel.comSigned-off-by: NChris Wilson <chris@chris-wilson.co.uk>

drivers/gpu/drm/i915/intel_engine_cs.c

@@ -1024,8 +1024,8 @@ static int bxt_init_workarounds(struct intel_engine_cs *engine)
 
 	/* WaDisablePooledEuLoadBalancingFix:bxt */
 	if (IS_BXT_REVID(dev_priv, BXT_REVID_B0, REVID_FOREVER)) {
-		WA_SET_BIT_MASKED(FF_SLICE_CS_CHICKEN2,
-				  GEN9_POOLED_EU_LOAD_BALANCING_FIX_DISABLE);
+		I915_WRITE(FF_SLICE_CS_CHICKEN2,
+			   _MASKED_BIT_ENABLE(GEN9_POOLED_EU_LOAD_BALANCING_FIX_DISABLE));
 	}
 
 	/* WaDisableSbeCacheDispatchPortSharing:bxt */