drm: bridge: nwl-dsi: Drop panel_bridge from nwl_dsi

panel_bridge pointer never used anywhere except the one it
looked up at nwl_dsi_bridge_attach.

Drop it from the nwl_dsi structure.
Reviewed-by: NGuido Günther <agx@sigxcpu.org>
Signed-off-by: NJagan Teki <jagan@amarulasolutions.com>
Signed-off-by: NRobert Foss <robert.foss@linaro.org>
Link: https://patchwork.freedesktop.org/patch/msgid/20220110172533.66614-1-jagan@amarulasolutions.com

drivers/gpu/drm/bridge/nwl-dsi.c

@@ -65,7 +65,6 @@ struct nwl_dsi_transfer {
 struct nwl_dsi {
 	struct drm_bridge bridge;
 	struct mipi_dsi_host dsi_host;
-	struct drm_bridge *panel_bridge;
 	struct device *dev;
 	struct phy *phy;
 	union phy_configure_opts phy_cfg;
@@ -924,13 +923,11 @@ static int nwl_dsi_bridge_attach(struct drm_bridge *bridge,
 		if (IS_ERR(panel_bridge))
 			return PTR_ERR(panel_bridge);
 	}
-	dsi->panel_bridge = panel_bridge;
 
-	if (!dsi->panel_bridge)
+	if (!panel_bridge)
 		return -EPROBE_DEFER;
 
-	return drm_bridge_attach(bridge->encoder, dsi->panel_bridge, bridge,
-				 flags);
+	return drm_bridge_attach(bridge->encoder, panel_bridge, bridge, flags);
 }
 
 static void nwl_dsi_bridge_detach(struct drm_bridge *bridge)