usb: host: xhci-tegra: Add missing of_node_put() in tegra_xusb_probe()

This node pointer is returned by of_parse_phandle() with refcount
incremented in this function. of_node_put() on it before exitting
this function.

Fixes: 971ee247 ("usb: xhci: tegra: Enable ELPG for runtime/system PM")
Reported-by: Hulk Robot <hulkci@huawei.com>
Signed-off-by: Yang Yingliang <yangyingliang@huawei.com>
Link: https://lore.kernel.org/r/20210616044519.2183826-2-yangyingliang@huawei.comSigned-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/usb/host/xhci-tegra.c

@@ -1755,6 +1755,7 @@ static int tegra_xusb_probe(struct platform_device *pdev)
 put_powerdomains:
 	tegra_xusb_powerdomain_remove(&pdev->dev, tegra);
 put_padctl:
+	of_node_put(np);
 	tegra_xusb_padctl_put(tegra->padctl);
 	return err;
 }