winnls32: Use --prefer-native instead of DLL_WINE_PREATTACH.

dlls/winnls32/Makefile.in

 MODULE    = winnls32.dll
 IMPORTLIB = winnls32
 
-EXTRADLLFLAGS = -mno-cygwin
+EXTRADLLFLAGS = -mno-cygwin -Wb,--prefer-native
 
 C_SRCS = \
 	winnls.c

dlls/winnls32/winnls.c

@@ -23,22 +23,6 @@
 #include "winnls32.h"
 
 /***********************************************************************
- *		DllMain  (WINNLS.@)
- */
-BOOL WINAPI DllMain( HINSTANCE inst, DWORD reason, LPVOID reserved )
-{
-    switch(reason)
-    {
-    case DLL_WINE_PREATTACH:
-        return FALSE;  /* prefer native version */
-    case DLL_PROCESS_ATTACH:
-        DisableThreadLibraryCalls( inst );
-        break;
-    }
-    return TRUE;
-}
-
-/***********************************************************************
  *		WINNLS32GetEnableStatus (WINNLS32.2)
  */
 BOOL WINAPI WINNLS32GetEnableStatus(HWND hWnd)