ASoC: SOF: imx: Add missing of_node_put() in imx8_probe()

This node pointer is returned by of_parse_phandle() with refcount
incremented in this function. of_node_put() on it before exiting
this function.
Signed-off-by: Yang Yingliang <yangyingliang@huawei.com>
Link: https://lore.kernel.org/r/20210617032756.599359-1-yangyingliang@huawei.comSigned-off-by: Mark Brown <broonie@kernel.org>

sound/soc/sof/imx/imx8.c

@@ -315,6 +315,7 @@ static int imx8_probe(struct snd_sof_dev *sdev)
 	}
 
 	ret = of_address_to_resource(res_node, 0, &res);
+	of_node_put(res_node);
 	if (ret) {
 		dev_err(&pdev->dev, "failed to get reserved region address\n");
 		goto exit_pdev_unregister;