drm/i915/gen9: Merge two WA as they part of same register

Merge Wa4x4STCOptimizationDisable and WaDisablePartialResolveInVc to save
an entry in WA array.
Signed-off-by: Arun Siluvery <arun.siluvery@linux.intel.com>
Reviewed-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>

drivers/gpu/drm/i915/intel_ringbuffer.c

@@ -961,10 +961,9 @@ static int gen9_init_workarounds(struct intel_engine_cs *ring)
 	}
 
 	/* Wa4x4STCOptimizationDisable:skl,bxt */
-	WA_SET_BIT_MASKED(CACHE_MODE_1, GEN8_4x4_STC_OPTIMIZATION_DISABLE);
-
 	/* WaDisablePartialResolveInVc:skl,bxt */
-	WA_SET_BIT_MASKED(CACHE_MODE_1, GEN9_PARTIAL_RESOLVE_IN_VC_DISABLE);
+	WA_SET_BIT_MASKED(CACHE_MODE_1, (GEN8_4x4_STC_OPTIMIZATION_DISABLE |
+					 GEN9_PARTIAL_RESOLVE_IN_VC_DISABLE));
 
 	/* WaCcsTlbPrefetchDisable:skl,bxt */
 	WA_CLR_BIT_MASKED(GEN9_HALF_SLICE_CHICKEN5,