Update Linux to v5.4.2

Change-Id: Idf6911045d9d382da2cfe01b1edff026404ac8fd
diff --git a/tools/perf/util/usage.c b/tools/perf/util/usage.c
index 070d25c..196438e 100644
--- a/tools/perf/util/usage.c
+++ b/tools/perf/util/usage.c
@@ -8,7 +8,9 @@
  * Copyright (C) Linus Torvalds, 2005
  */
 #include "util.h"
-#include "debug.h"
+#include <stdio.h>
+#include <stdlib.h>
+#include <linux/compiler.h>
 
 static __noreturn void usage_builtin(const char *err)
 {