Add configure interrupt support for virtio-mmio bus. This
interrupt will be working while the backend is vhost-vdpa
Signed-off-by: Cindy Lu <lulu@redhat.com>
Message-Id: <20211104164827.21911-10-lulu@redhat.com>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>