drm/i915: Tune done rc6 enabling output

Power users spot this and then get adventurous and try to adjust
module driver options. Nothing good ever came out of that, so
hide it better.
Reviewed-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Reviewed-by: Paulo Zanoni <paulo.r.zanoni@intel.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>

drivers/gpu/drm/i915/intel_pm.c

@@ -3420,7 +3420,7 @@ static void intel_print_rc6_info(struct drm_device *dev, u32 mode)
 		else
 			mode = 0;
 	}
-	DRM_INFO("Enabling RC6 states: RC6 %s, RC6p %s, RC6pp %s\n",
+	DRM_DEBUG_KMS("Enabling RC6 states: RC6 %s, RC6p %s, RC6pp %s\n",
 		      (mode & GEN6_RC_CTL_RC6_ENABLE) ? "on" : "off",
 		      (mode & GEN6_RC_CTL_RC6p_ENABLE) ? "on" : "off",
 		      (mode & GEN6_RC_CTL_RC6pp_ENABLE) ? "on" : "off");
@@ -3447,7 +3447,7 @@ static int sanitize_rc6_option(const struct drm_device *dev, int enable_rc6)
 			mask = INTEL_RC6_ENABLE;
 
 		if ((enable_rc6 & mask) != enable_rc6)
-			DRM_INFO("Adjusting RC6 mask to %d (requested %d, valid %d)\n",
+			DRM_DEBUG_KMS("Adjusting RC6 mask to %d (requested %d, valid %d)\n",
 				      enable_rc6 & mask, enable_rc6, mask);
 
 		return enable_rc6 & mask;