ASoC: SOF: imx8ulp: add missing of_node_put() in imx8ulp_probe()

After using 'res_node' returned by of_parse_phandle(), of_node_put()
need be called to decrease the refcount.

Fixes: fb5319af6ad8 ("ASoC: SOF: imx: Add i.MX8ULP HW support")
Signed-off-by: Yang Yingliang <[e-mail]>
Link: https://lore.kernel.org/r/[e-mail]
Signed-off-by: Mark Brown <[e-mail]>

sound/soc/sof/imx/imx8ulp.c

···
 	}
 
 	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;