drm/bridge: parade-ps8640: switch to devm_drm_of_get_bridge

The function "drm_of_find_panel_or_bridge" has been deprecated in
favor of "devm_drm_of_get_bridge".

Switch to the new function and reduce boilerplate.
Signed-off-by: José Expósito <jose.exposito89@gmail.com>
Signed-off-by: Maxime Ripard <maxime@cerno.tech>
Link: https://patchwork.freedesktop.org/patch/msgid/20220228183131.23494-1-jose.exposito89@gmail.com

drivers/gpu/drm/bridge/parade-ps8640.c

@@ -589,7 +589,6 @@ static int ps8640_probe(struct i2c_client *client)
 	struct device *dev = &client->dev;
 	struct device_node *np = dev->of_node;
 	struct ps8640 *ps_bridge;
-	struct drm_panel *panel;
 	int ret;
 	u32 i;
 
@@ -674,13 +673,7 @@ static int ps8640_probe(struct i2c_client *client)
 	devm_of_dp_aux_populate_ep_devices(&ps_bridge->aux);
 
 	/* port@1 is ps8640 output port */
-	ret = drm_of_find_panel_or_bridge(np, 1, 0, &panel, NULL);
-	if (ret < 0)
-		return ret;
-	if (!panel)
-		return -ENODEV;
-
-	ps_bridge->panel_bridge = devm_drm_panel_bridge_add(dev, panel);
+	ps_bridge->panel_bridge = devm_drm_of_get_bridge(dev, np, 1, 0);
 	if (IS_ERR(ps_bridge->panel_bridge))
 		return PTR_ERR(ps_bridge->panel_bridge);