headers_check fix: linux/efs_fs_sb.h

fix the following 'make headers_check' warning:

  usr/include/linux/efs_fs_sb.h:49: found __[us]{8,16,32,64} type without #include <linux/types.h>
Signed-off-by: Jaswinder Singh Rajput <jaswinderrajput@gmail.com>

include/linux/efs_fs_sb.h

@@ -9,6 +9,7 @@
 #ifndef __EFS_FS_SB_H__
 #define __EFS_FS_SB_H__
 
+#include <linux/types.h>
 #include <linux/magic.h>
 
 /* EFS superblock magic numbers */