drm/i915: We implement WaDisableRCCUnitClockGating:snb

Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Reviewed-by: Rodrigo Vivi <rodrigo.vivi@gmail.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
diff --git a/drivers/gpu/drm/i915/intel_pm.c b/drivers/gpu/drm/i915/intel_pm.c
index 83bd43f..d91d9ac 100644
--- a/drivers/gpu/drm/i915/intel_pm.c
+++ b/drivers/gpu/drm/i915/intel_pm.c
@@ -4609,6 +4609,7 @@
 	 * but we didn't debug actual testcases to find it out.
 	 *
 	 * Also apply WaDisableVDSUnitClockGating:snb and
+	 * WaDisableRCCUnitClockGating:snb and
 	 * WaDisableRCPBUnitClockGating:snb.
 	 */
 	I915_WRITE(GEN6_UCGCTL2,