Update Linux to v5.4.2

Change-Id: Idf6911045d9d382da2cfe01b1edff026404ac8fd
diff --git a/include/linux/libfdt_env.h b/include/linux/libfdt_env.h
index c6ac1fe..edb0f0c 100644
--- a/include/linux/libfdt_env.h
+++ b/include/linux/libfdt_env.h
@@ -2,6 +2,7 @@
 #ifndef LIBFDT_ENV_H
 #define LIBFDT_ENV_H
 
+#include <linux/kernel.h>	/* For INT_MAX */
 #include <linux/string.h>
 
 #include <asm/byteorder.h>