Update Linux to v5.4.2

Change-Id: Idf6911045d9d382da2cfe01b1edff026404ac8fd
diff --git a/drivers/macintosh/windfarm.h b/drivers/macintosh/windfarm.h
index 901c42f..5eb480d 100644
--- a/drivers/macintosh/windfarm.h
+++ b/drivers/macintosh/windfarm.h
@@ -1,10 +1,9 @@
+/* SPDX-License-Identifier: GPL-2.0-only */
 /*
  * Windfarm PowerMac thermal control.
  *
  * (c) Copyright 2005 Benjamin Herrenschmidt, IBM Corp.
  *                    <benh@kernel.crashing.org>
- *
- * Released under the term of the GNU GPL v2.
  */
 
 #ifndef __WINDFARM_H__