hw/virtio: convert vhost-user-base to async shutdown

We are about to convert at least one stubs which was using the async
teardown so lets use it for all the cases.

Signed-off-by: Alex Bennée <alex.bennee@linaro.org>
Message-Id: <20240104210945.1223134-3-alex.bennee@linaro.org>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
1 file changed