drm: bridge: nwl-dsi: Switch to devm_drm_of_get_bridge

devm_drm_of_get_bridge is capable of looking up the downstream
bridge and panel and trying to add a panel bridge if the panel
is found.

Replace explicit finding calls with devm_drm_of_get_bridge.
Reviewed-by: Guido Günther <agx@sigxcpu.org>
Signed-off-by: Jagan Teki <jagan@amarulasolutions.com>
Signed-off-by: Robert Foss <robert.foss@linaro.org>
Link: https://patchwork.freedesktop.org/patch/msgid/20220331154503.66054-2-jagan@amarulasolutions.com

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

@@ -25,7 +25,6 @@
 #include <drm/drm_bridge.h>
 #include <drm/drm_mipi_dsi.h>
 #include <drm/drm_of.h>
-#include <drm/drm_panel.h>
 #include <drm/drm_print.h>
 
 #include <video/mipi_display.h>
@@ -912,22 +911,10 @@ static int nwl_dsi_bridge_attach(struct drm_bridge *bridge,
 {
 	struct nwl_dsi *dsi = bridge_to_dsi(bridge);
 	struct drm_bridge *panel_bridge;
-	struct drm_panel *panel;
-	int ret;
-
-	ret = drm_of_find_panel_or_bridge(dsi->dev->of_node, 1, 0, &panel,
-					  &panel_bridge);
-	if (ret)
-		return ret;
-
-	if (panel) {
-		panel_bridge = drm_panel_bridge_add(panel);
-		if (IS_ERR(panel_bridge))
-			return PTR_ERR(panel_bridge);
-	}
 
-	if (!panel_bridge)
-		return -EPROBE_DEFER;
+	panel_bridge = devm_drm_of_get_bridge(dsi->dev, dsi->dev->of_node, 1, 0);
+	if (IS_ERR(panel_bridge))
+		return PTR_ERR(panel_bridge);
 
 	return drm_bridge_attach(bridge->encoder, panel_bridge, bridge, flags);
 }