drm/i915: add a few missing platform tags to workaround tags

Cc: Paulo Zanoni <paulo.r.zanoni@intel.com>
Reviewed-by: Paulo Zanoni <paulo.r.zanoni@intel.com>
Signed-off-by: Jani Nikula <jani.nikula@intel.com>
Link: http://patchwork.freedesktop.org/patch/msgid/1474891672-23414-1-git-send-email-jani.nikula@intel.com

drivers/gpu/drm/i915/intel_guc_loader.c

@@ -381,7 +381,7 @@ static int guc_ucode_xfer(struct drm_i915_private *dev_priv)
 					      ~GUC_ENABLE_MIA_CLOCK_GATING));
 	}
 
-	/* WaC6DisallowByGfxPause*/
+	/* WaC6DisallowByGfxPause:bxt */
 	if (IS_BXT_REVID(dev, 0, BXT_REVID_B0))
 		I915_WRITE(GEN6_GFXPAUSE, 0x30FFF);
 

drivers/gpu/drm/i915/intel_pm.c

@@ -5361,7 +5361,7 @@ static void gen9_enable_rc6(struct drm_i915_private *dev_priv)
 	if (intel_enable_rc6() & INTEL_RC6_ENABLE)
 		rc6_mask = GEN6_RC_CTL_RC6_ENABLE;
 	DRM_INFO("RC6 %s\n", onoff(rc6_mask & GEN6_RC_CTL_RC6_ENABLE));
-	/* WaRsUseTimeoutMode */
+	/* WaRsUseTimeoutMode:bxt */
 	if (IS_BXT_REVID(dev_priv, 0, BXT_REVID_A1)) {
 		I915_WRITE(GEN6_RC6_THRESHOLD, 625); /* 800us */
 		I915_WRITE(GEN6_RC_CONTROL, GEN6_RC_CTL_HW_ENABLE |