Update Linux to v5.4.2

Change-Id: Idf6911045d9d382da2cfe01b1edff026404ac8fd
diff --git a/include/linux/pinctrl/pinmux.h b/include/linux/pinctrl/pinmux.h
index ace60d7..9a647fa 100644
--- a/include/linux/pinctrl/pinmux.h
+++ b/include/linux/pinctrl/pinmux.h
@@ -1,3 +1,4 @@
+/* SPDX-License-Identifier: GPL-2.0-only */
 /*
  * Interface the pinmux subsystem
  *
@@ -6,8 +7,6 @@
  * Based on bits of regulator core, gpio core and clk core
  *
  * Author: Linus Walleij <linus.walleij@linaro.org>
- *
- * License terms: GNU General Public License (GPL) version 2
  */
 #ifndef __LINUX_PINCTRL_PINMUX_H
 #define __LINUX_PINCTRL_PINMUX_H
@@ -16,8 +15,6 @@
 #include <linux/seq_file.h>
 #include <linux/pinctrl/pinctrl.h>
 
-#ifdef CONFIG_PINMUX
-
 struct pinctrl_dev;
 
 /**
@@ -85,6 +82,4 @@
 	bool strict;
 };
 
-#endif /* CONFIG_PINMUX */
-
 #endif /* __LINUX_PINCTRL_PINMUX_H */