Rdma device driver support

[xubo3006]

I try to add rdma device driver support,like infiniband mlx4 or Soft-RoCE.
It's hard to handle the large number of pointer related operations generated by complex device drivers.
Another issue is that static inline functions are not yet supported as show in #353 , and netdev have many inline functions.
At present, there is no implementation precedent learning related to complex drivers, and I can only try to write basic interfaces.