drm/omap: dss: Remove panel devices list

The panel devices list isn't used anymore, all panel devices are
accessed through the global devices list. Remove it.

Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Reviewed-by: Sebastian Reichel <sebastian.reichel@collabora.co.uk>
Signed-off-by: Tomi Valkeinen <tomi.valkeinen@ti.com>

drivers/gpu/drm/omapdrm/displays/panel-tpo-td028ttec1.c

@@ -395,11 +395,7 @@ static int td028ttec1_panel_probe(struct spi_device *spi)
 	dssdev->owner = THIS_MODULE;
 
 	omapdss_display_init(dssdev);
-	r = omapdss_register_display(dssdev);
-	if (r) {
-		dev_err(&spi->dev, "Failed to register panel\n");
-		return r;
-	}
+	omapdss_device_register(dssdev);
 
 	return 0;
 }
@@ -411,7 +407,7 @@ static int td028ttec1_panel_remove(struct spi_device *spi)
 
 	dev_dbg(&ddata->spi_dev->dev, "%s\n", __func__);
 
-	omapdss_unregister_display(dssdev);
+	omapdss_device_unregister(dssdev);
 
 	td028ttec1_panel_disable(dssdev);
 	omapdss_device_disconnect(dssdev, NULL);