[d3d11] Fixed incorrect aspect mask for depth-stencil clear ops

Application may specify a clear flag that the image format does
not support, in which case it should just be ignored. Fixes
validation errors in Microsoft's MultiThreadedRendering demo.

src/d3d11/d3d11_context.cpp

@@ -473,6 +473,10 @@ namespace dxvk {
     if (ClearFlags & D3D11_CLEAR_STENCIL)
       aspectMask |= VK_IMAGE_ASPECT_STENCIL_BIT;
     
+    const DxvkFormatInfo* formatInfo =
+      imageFormatInfo(dxvkView->info().format);
+    aspectMask &= formatInfo->aspectMask;
+    
     VkClearDepthStencilValue clearValue;
     clearValue.depth   = Depth;
     clearValue.stencil = Stencil;