dxva2: Use --prefer-native instead of DLL_WINE_PREATTACH.

Signed-off-by: Alexandre Julliard <julliard@winehq.org>

dlls/dxva2/Makefile.in

@@ -2,7 +2,7 @@ MODULE    = dxva2.dll
 IMPORTS   = uuid ole32
 IMPORTLIB = dxva2
 
-EXTRADLLFLAGS = -mno-cygwin
+EXTRADLLFLAGS = -mno-cygwin -Wb,--prefer-native
 
 C_SRCS = \
 	main.c

dlls/dxva2/main.c

@@ -1212,18 +1212,3 @@ BOOL WINAPI SetVCPFeature( HMONITOR monitor, BYTE vcpCode, DWORD value )
     SetLastError(ERROR_CALL_NOT_IMPLEMENTED);
     return FALSE;
 }
-
-BOOL WINAPI DllMain (HINSTANCE hinstDLL, DWORD fdwReason, LPVOID lpvReserved)
-{
-    TRACE("%p,%x,%p\n", hinstDLL, fdwReason, lpvReserved);
-
-    switch (fdwReason) {
-        case DLL_WINE_PREATTACH:
-            return FALSE;  /* prefer native version */
-        case DLL_PROCESS_ATTACH:
-            DisableThreadLibraryCalls(hinstDLL);
-            break;
-    }
-
-    return TRUE;
-}