input_server/virtio: add new virtio input device

Change-Id: I9e55349717231a5b13f0bce351f349a54c1f643e
Reviewed-on: https://review.haiku-os.org/c/haiku/+/3978
Tested-by: Commit checker robot <no-reply+buildbot@haiku-os.org>
Reviewed-by: Jérôme Duval <jerome.duval@gmail.com>