virtio-rng-ccw: switch to the new API.

virtio-rng-ccw: switch to the new API.

Here the virtio-rng-ccw is modified for the new API. The device
virtio-rng-pci extends virtio-pci. It creates and connects a virtio-rng-device
during the init. The properties are not changed.

Signed-off-by: KONRAD Frederic <fred.konrad@greensocs.com>
Tested-by: Cornelia Huck <cornelia.huck@de.ibm.com>
Acked-by: Amit Shah <amit.shah@redhat.com>
Message-id: 1366790881-3026-6-git-send-email-fred.konrad@greensocs.com
Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>