drm/virtio: rework virtio_gpu_transfer_from_host_ioctl fencing

Switch to the virtio_gpu_array_* helper workflow.

Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
Reviewed-by: Chia-I Wu <olvaffe@gmail.com>
Link: http://patchwork.freedesktop.org/patch/msgid/20190829103301.3539-11-kraxel@redhat.com
3 files changed