Update Linux to v5.4.2

Change-Id: Idf6911045d9d382da2cfe01b1edff026404ac8fd
diff --git a/drivers/memory/ti-aemif.c b/drivers/memory/ti-aemif.c
index 475e5b3..db526db 100644
--- a/drivers/memory/ti-aemif.c
+++ b/drivers/memory/ti-aemif.c
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-2.0-only
 /*
  * TI AEMIF driver
  *
@@ -6,10 +7,6 @@
  * Authors:
  * Murali Karicheri <m-karicheri2@ti.com>
  * Ivan Khoronzhuk <ivan.khoronzhuk@ti.com>
- *
- * 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/clk.h>