gpu: ipu-v3: common: Add of_node_put() for reference returned by of_graph_get_port_by_id()

In ipu_add_client_devices(), we need to call of_node_put() for
reference returned by of_graph_get_port_by_id() in fail path.

Fixes: 17e05217 ("gpu: ipu-v3: Do not bail out on missing optional port nodes")
Signed-off-by: Liang He <windhl@126.com>
Reviewed-by: Philipp Zabel <p.zabel@pengutronix.de>
Link: https://lore.kernel.org/r/20220720152227.1288413-1-windhl@126.comSigned-off-by: Philipp Zabel <p.zabel@pengutronix.de>
Link: https://patchwork.freedesktop.org/patch/msgid/20220720152227.1288413-1-windhl@126.com

drivers/gpu/ipu-v3/ipu-common.c

@@ -1165,6 +1165,7 @@ static int ipu_add_client_devices(struct ipu_soc *ipu, unsigned long ipu_base)
 		pdev = platform_device_alloc(reg->name, id++);
 		if (!pdev) {
 			ret = -ENOMEM;
+			of_node_put(of_node);
 			goto err_register;
 		}