drm/i915: Print wm changes if sagv_wm0 changes

Let's consider sagv_wm0 as well when deciding whether to dump
out the watermark changes.

Cc: Stanislav Lisovskiy <stanislav.lisovskiy@intel.com>
Signed-off-by: NVille Syrjälä <ville.syrjala@linux.intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20210226153204.1270-4-ville.syrjala@linux.intel.comReviewed-by: NStanislav Lisovskiy <stanislav.lisovskiy@intel.com>

drivers/gpu/drm/i915/intel_pm.c

@@ -5647,7 +5647,8 @@ static bool skl_plane_wm_equals(struct drm_i915_private *dev_priv,
 			return false;
 	}
 
-	return skl_wm_level_equals(&wm1->trans_wm, &wm2->trans_wm);
+	return skl_wm_level_equals(&wm1->trans_wm, &wm2->trans_wm) &&
+		skl_wm_level_equals(&wm1->sagv_wm0, &wm2->sagv_wm0);
 }
 
 static bool skl_ddb_entries_overlap(const struct skl_ddb_entry *a,