3644 Add virtio-net support into the Illumos
Reviewed by: Alexey Zaytsev, alexey.zaytsev@gmail.com
Reviewed by: Yuri Pankov, yuri.pankov@nexenta.com
Reviewed by: David Hoppner, 0xffea@gmail.com

*** 182,191 ****
--- 182,192 ----
  void virtio_free_vq(struct virtqueue *);
  void virtio_reset(struct virtio_softc *);
  struct vq_entry *vq_alloc_entry(struct virtqueue *vq);
  void vq_free_entry(struct virtqueue *vq, struct vq_entry *qe);
  uint_t vq_num_used(struct virtqueue *vq);
+ unsigned int virtio_ve_indirect_available(struct vq_entry *qe);
  
  void virtio_stop_vq_intr(struct virtqueue *);
  void virtio_start_vq_intr(struct virtqueue *);
  
  void virtio_ve_add_cookie(struct vq_entry *qe, ddi_dma_handle_t dma_handle,