Update Linux to v5.4.2

Change-Id: Idf6911045d9d382da2cfe01b1edff026404ac8fd
diff --git a/sound/aoa/soundbus/i2sbus/interface.h b/sound/aoa/soundbus/i2sbus/interface.h
index c6b5f54..16fa888 100644
--- a/sound/aoa/soundbus/i2sbus/interface.h
+++ b/sound/aoa/soundbus/i2sbus/interface.h
@@ -1,9 +1,8 @@
+/* SPDX-License-Identifier: GPL-2.0-only */
 /*
  * i2sbus driver -- interface register definitions
  *
  * Copyright 2006 Johannes Berg <johannes@sipsolutions.net>
- *
- * GPL v2, can be found in COPYING.
  */
 #ifndef __I2SBUS_INTERFACE_H
 #define __I2SBUS_INTERFACE_H