IB/mlx4: Fix check of max_qp_dest_rdma in modify QP

max_qp_dest_rdma is already in natural units - no need to shift.  This
was discovered by a test that deliberately requests more outstanding
atomic operation than the device supports.

Found by Sagi Rotem at Mellanox.
Signed-off-by: Eli Cohen <eli@mellanox.co.il>
Signed-off-by: Roland Dreier <rolandd@cisco.com>

drivers/infiniband/hw/mlx4/qp.c

@@ -694,7 +694,7 @@ int mlx4_ib_modify_qp(struct ib_qp *ibqp, struct ib_qp_attr *attr,
 	}
 
 	if (attr_mask & IB_QP_MAX_DEST_RD_ATOMIC &&
-	    attr->max_dest_rd_atomic > 1 << dev->dev->caps.max_qp_dest_rdma) {
+	    attr->max_dest_rd_atomic > dev->dev->caps.max_qp_dest_rdma) {
 		goto out;
 	}