message: Rename UVM shorcut to MFEM_USE_UVM
diff: @@ -193,7 +193,7 @@ void Device::UpdateMemoryTypeAndClass()
  }
  // Enable the UVM shortcut when requested
  - if (getenv("UVM") && device)
  + if (getenv("MFEM_USE_UVM") && device)
  {
  host_mem_type = MemoryType::HOST_MANAGED;
  device_mem_type = MemoryType::DEVICE_MANAGED;
  