Update Linux to v5.4.2

Change-Id: Idf6911045d9d382da2cfe01b1edff026404ac8fd
diff --git a/drivers/soc/tegra/common.c b/drivers/soc/tegra/common.c
index cd8f413..3dc54f5 100644
--- a/drivers/soc/tegra/common.c
+++ b/drivers/soc/tegra/common.c
@@ -1,9 +1,6 @@
+// SPDX-License-Identifier: GPL-2.0-only
 /*
  * Copyright (C) 2014 NVIDIA CORPORATION.  All rights reserved.
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License version 2 as
- * published by the Free Software Foundation.
  */
 
 #include <linux/of.h>
@@ -22,11 +19,15 @@
 
 bool soc_is_tegra(void)
 {
+	const struct of_device_id *match;
 	struct device_node *root;
 
 	root = of_find_node_by_path("/");
 	if (!root)
 		return false;
 
-	return of_match_node(tegra_machine_match, root) != NULL;
+	match = of_match_node(tegra_machine_match, root);
+	of_node_put(root);
+
+	return match != NULL;
 }