Moved all the content of the DDK files ntdef.h and ntddk.h to
winternl.h.

diff --git a/files/dos_fs.c b/files/dos_fs.c
index f7e5806..3cb33f1 100644
--- a/files/dos_fs.c
+++ b/files/dos_fs.c
@@ -50,7 +50,7 @@
 #include "file.h"
 #include "heap.h"
 #include "msdos.h"
-#include "ntddk.h"
+#include "winternl.h"
 #include "wine/server.h"
 #include "msvcrt/excpt.h"