Update Linux to v5.4.2

Change-Id: Idf6911045d9d382da2cfe01b1edff026404ac8fd
diff --git a/include/linux/mmc/sd.h b/include/linux/mmc/sd.h
index 1ebcf9b..2236aa5 100644
--- a/include/linux/mmc/sd.h
+++ b/include/linux/mmc/sd.h
@@ -1,12 +1,8 @@
+/* SPDX-License-Identifier: GPL-2.0-or-later */
 /*
  *  include/linux/mmc/sd.h
  *
  *  Copyright (C) 2005-2007 Pierre Ossman, 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 as published by
- * the Free Software Foundation; either version 2 of the License, or (at
- * your option) any later version.
  */
 
 #ifndef LINUX_MMC_SD_H
@@ -91,4 +87,10 @@
 #define SD_SWITCH_ACCESS_DEF	0
 #define SD_SWITCH_ACCESS_HS	1
 
+/*
+ * Erase/discard
+ */
+#define SD_ERASE_ARG			0x00000000
+#define SD_DISCARD_ARG			0x00000001
+
 #endif /* LINUX_MMC_SD_H */