Merge pull request #11224 from iwubcode/d3d12_subresource

VideoBackends: fix d3d12 subresource calculation

Source/Core/VideoBackends/D3D12/DX12Texture.h

@@ -37,7 +37,7 @@ class DXTexture final : public AbstractTexture
   const DescriptorHandle& GetSRVDescriptor() const { return m_srv_descriptor; }
   const DescriptorHandle& GetUAVDescriptor() const { return m_uav_descriptor; }
   D3D12_RESOURCE_STATES GetState() const { return m_state; }
-  u32 CalcSubresource(u32 level, u32 layer) const { return level + layer * m_config.layers; }
+  u32 CalcSubresource(u32 level, u32 layer) const { return level + layer * m_config.levels; }
 
   void TransitionToState(D3D12_RESOURCE_STATES state) const;