Update Linux to v5.4.2

Change-Id: Idf6911045d9d382da2cfe01b1edff026404ac8fd
diff --git a/include/linux/mtd/sharpsl.h b/include/linux/mtd/sharpsl.h
index e1845fc..d2c3cf2 100644
--- a/include/linux/mtd/sharpsl.h
+++ b/include/linux/mtd/sharpsl.h
@@ -1,13 +1,13 @@
+/* SPDX-License-Identifier: GPL-2.0-only */
 /*
  * SharpSL NAND support
  *
  * Copyright (C) 2008 Dmitry Baryshkov
- *
- * 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.
  */
 
+#ifndef _MTD_SHARPSL_H
+#define _MTD_SHARPSL_H
+
 #include <linux/mtd/rawnand.h>
 #include <linux/mtd/nand_ecc.h>
 #include <linux/mtd/partitions.h>
@@ -19,3 +19,5 @@
 	unsigned int		nr_partitions;
 	const char *const	*part_parsers;
 };
+
+#endif /* _MTD_SHARPSL_H */