[PATCH] virtio: fix build for configs without dma-bufs

[Gerd Hoffmann]

On Wed, Aug 19, 2020 at 12:10:11PM +0900, David Stevens wrote:
> Reported-by: kernel test robot <lkp at intel.com>
> Signed-off-by: David Stevens <stevensd at chromium.org>

Pushed to drm-misc-next

thanks for the qick fix,
  Gerd