[dxvk] Add Direct3D9ForceHybridEnumeration empty export function.

src/d3d9/d3d9.def

@@ -23,3 +23,5 @@ EXPORTS
 
   DXVK_RegisterAnnotation @ 28257 NONAME
   DXVK_UnRegisterAnnotation @ 28258 NONAME
+
+  Direct3D9ForceHybridEnumeration @16 NONAME PRIVATE

src/d3d9/d3d9_main.cpp

@@ -98,4 +98,7 @@ extern "C" {
     dxvk::D3D9GlobalAnnotationList::Instance().UnregisterAnnotator(annotation);
   }
 
+  DLLEXPORT void __stdcall Direct3D9ForceHybridEnumeration(UINT uHybrid) {
+  }
+
 }