Update Linux to v5.4.2

Change-Id: Idf6911045d9d382da2cfe01b1edff026404ac8fd
diff --git a/include/linux/can/skb.h b/include/linux/can/skb.h
index b3379a9..a954def 100644
--- a/include/linux/can/skb.h
+++ b/include/linux/can/skb.h
@@ -1,4 +1,4 @@
-/* SPDX-License-Identifier: GPL-2.0 */
+/* SPDX-License-Identifier: (GPL-2.0 OR BSD-3-Clause) */
 /*
  * linux/can/skb.h
  *