virtio_device_is_legacy_only is always false now,
drop the test from virtio mmio.
Signed-off-by: NMichael S. Tsirkin <mst@redhat.com>
Acked-by: NPawel Moll <pawel.moll@arm.com>
Signed-off-by: NRusty Russell <rusty@rustcorp.com.au>