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: 17e052175039 ("gpu: ipu-v3: Do not bail out on missing optional port nodes")
Signed-off-by: Liang He <[e-mail]>
Reviewed-by: Philipp Zabel <[e-mail]>
Link: https://lore.kernel.org/r/[e-mail]
Signed-off-by: Philipp Zabel <[e-mail]>
Link: https://patchwork.freedesktop.org/patch/msgid/[e-mail]

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

···
 		pdev = platform_device_alloc(reg->name, id++);
 		if (!pdev) {
 			ret = -ENOMEM;
+			of_node_put(of_node);
 			goto err_register;
 		}