staging/rdma/hfi1: Remove ibport and use rdmavt version

Remove most of the ibport members from hfi1 and use the rdmavt version.
Also register the port with rdmavt.

Reviewed-by: Mike Marciniszyn <mike.marciniszyn@intel.com>
Reviewed-by: Harish Chegondi <harish.chegondi@intel.com>
Signed-off-by: Dennis Dalessandro <dennis.dalessandro@intel.com>
Signed-off-by: Doug Ledford <dledford@redhat.com>