Update Linux to v5.4.2

Change-Id: Idf6911045d9d382da2cfe01b1edff026404ac8fd
diff --git a/drivers/input/mouse/logips2pp.h b/drivers/input/mouse/logips2pp.h
index bf62945..df885c4 100644
--- a/drivers/input/mouse/logips2pp.h
+++ b/drivers/input/mouse/logips2pp.h
@@ -1,23 +1,13 @@
+/* SPDX-License-Identifier: GPL-2.0-only */
 /*
  * Logitech PS/2++ mouse driver header
  *
  * Copyright (c) 2003 Vojtech Pavlik <vojtech@suse.cz>
- *
- * 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 _LOGIPS2PP_H
 #define _LOGIPS2PP_H
 
-#ifdef CONFIG_MOUSE_PS2_LOGIPS2PP
 int ps2pp_detect(struct psmouse *psmouse, bool set_properties);
-#else
-static inline int ps2pp_detect(struct psmouse *psmouse, bool set_properties)
-{
-	return -ENOSYS;
-}
-#endif /* CONFIG_MOUSE_PS2_LOGIPS2PP */
 
 #endif