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

diff --git a/dlls/kernel/kernel_main.c b/dlls/kernel/kernel_main.c
index ac0fa8a..555a931 100644
--- a/dlls/kernel/kernel_main.c
+++ b/dlls/kernel/kernel_main.c
@@ -29,7 +29,7 @@
 
 #include "winbase.h"
 #include "wincon.h"
-#include "ntddk.h"
+#include "winternl.h"
 
 #include "wine/winbase16.h"
 #include "wine/library.h"