[D3D12] Don't use D3D12Context for command processor fence

src/xenia/gpu/d3d12/primitive_converter.h

@@ -111,7 +111,7 @@ class PrimitiveConverter {
   // CPU-side, used only for uploading - destroyed once the copy commands have
   // been completed.
   ID3D12Resource* static_ib_upload_ = nullptr;
-  uint64_t static_ib_upload_frame_;
+  uint64_t static_ib_upload_fence_value_;
   // GPU-side - used for drawing.
   ID3D12Resource* static_ib_ = nullptr;
   D3D12_GPU_VIRTUAL_ADDRESS static_ib_gpu_address_;