IB/hfi1: Use accessor to determine ring size

The qp_stats print will soon be moving to rdmavt, so use the proper
accessor to get the ring size rather than a driver supplied constant.

Fixes: Commit ff8d836efe06 ("IB/hfi1: Add receiving queue info to qp_stats")
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>

drivers/infiniband/hw/hfi1/qp.c

@@ -659,7 +659,7 @@ void qp_iter_print(struct seq_file *s, struct qp_iter *iter)
 		   qp->s_avail,
 		   /* ack_queue ring pointers, size */
 		   qp->s_tail_ack_queue, qp->r_head_ack_queue,
-		   HFI1_MAX_RDMA_ATOMIC,
+		   rvt_max_atomic(&to_idev(qp->ibqp.device)->rdi),
 		   /* remote QP info  */
 		   qp->remote_qpn,
 		   rdma_ah_get_dlid(&qp->remote_ah_attr),