[ofw] patch 2/2 Add support for RDMAoEth to the low level driver

[Sean Hefty]

>RDMAoE always use gid for communication, thus grh_valid should be always true.
>With dgid=fe80::0,  ib_gid_is_link_local() will return true, and make grh_valid
>FALSE.

Yes - I understand that.  What I don't understand is *why* a path record for
RDMAoE would specify a hop count > 1 to begin with.  That doesn't make sense,
and a can't imagine that an RDMAoE specification would require a hop count > 1
for the local subnet case.  The RDMAoE checks need to be more explicit.

- Sean