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

dlls/mfplat/Makefile.in

@@ -2,7 +2,7 @@ MODULE    = mfplat.dll
 IMPORTLIB = mfplat
 IMPORTS   = advapi32 ole32 mfuuid propsys rtworkq
 
-EXTRADLLFLAGS = -mno-cygwin
+EXTRADLLFLAGS = -mno-cygwin -Wb,--prefer-native
 
 C_SRCS = \
 	buffer.c \

dlls/mfplat/main.c

@@ -702,20 +702,6 @@ static BOOL GUIDFromString(LPCWSTR s, GUID *id)
     return FALSE;
 }
 
-BOOL WINAPI DllMain(HINSTANCE instance, DWORD reason, LPVOID reserved)
-{
-    switch (reason)
-    {
-        case DLL_WINE_PREATTACH:
-            return FALSE;    /* prefer native version */
-        case DLL_PROCESS_ATTACH:
-            DisableThreadLibraryCalls(instance);
-            break;
-    }
-
-    return TRUE;
-}
-
 static HRESULT register_transform(const CLSID *clsid, const WCHAR *name, UINT32 flags,
         UINT32 cinput, const MFT_REGISTER_TYPE_INFO *input_types, UINT32 coutput,
         const MFT_REGISTER_TYPE_INFO *output_types, IMFAttributes *attributes)