IB/hfi1: Convert hfi1_error_port_qps() to use new QP iterator

Change hfi1_error_port_qps() to use the new rvt_qp_iter() in its QP
scanning.

Reviewed-by: Kaike Wan <kaike.wan@intel.com>
Signed-off-by: Mike Marciniszyn <mike.marciniszyn@intel.com>
Signed-off-by: Dennis Dalessandro <dennis.dalessandro@intel.com>
Signed-off-by: Doug Ledford <dledford@redhat.com>