Update Linux to v5.4.2

Change-Id: Idf6911045d9d382da2cfe01b1edff026404ac8fd
diff --git a/drivers/ras/debugfs.c b/drivers/ras/debugfs.c
index 5016030..0d4f985 100644
--- a/drivers/ras/debugfs.c
+++ b/drivers/ras/debugfs.c
@@ -1,4 +1,7 @@
+// SPDX-License-Identifier: GPL-2.0-only
 #include <linux/debugfs.h>
+#include <linux/ras.h>
+#include "debugfs.h"
 
 struct dentry *ras_debugfs_dir;