message: Fix Pconf allows CUDA => DEVICE_MASK
diff: @@ -859,7 +859,7 @@ const Operator *ParFiniteElementSpace::GetProlongationMatrix() const
  {
  if (!Pconf)
  {
  - if (!Device::Allows(Backend::CUDA))
  + if (!Device::Allows(Backend::DEVICE_MASK))
  {
  Pconf = new ConformingProlongationOperator(*this);
  }
  