hw/s390x: Move virtio-ccw-rng code to a separate file

The code should only be enabled if CONFIG_VIRTIO_RNG has been set.
This can be done best if the code resides in a separate file.

Signed-off-by: Thomas Huth <thuth@redhat.com>
Message-Id: <1532521224-27235-6-git-send-email-thuth@redhat.com>
Signed-off-by: Cornelia Huck <cohuck@redhat.com>
3 files changed