IB/core: Fix wrong iterating on ports

rdma_for_each_port is already incrementing the iterator's value it
receives therefore, after the first iteration the iterator is increased by
2 which eventually causing wrong queries and possible traces.

Fix the above by removing the old redundant incrementation that was used
before rdma_for_each_port() macro.

Cc: <stable@vger.kernel.org>
Fixes: ea1075ed ("RDMA: Add and use rdma_for_each_port")
Link: https://lore.kernel.org/r/20191002122127.17571-1-leon@kernel.orgSigned-off-by: Mohamad Heib <mohamadh@mellanox.com>
Reviewed-by: Erez Alfasi <ereza@mellanox.com>
Signed-off-by: Leon Romanovsky <leonro@mellanox.com>
Reviewed-by: Jason Gunthorpe <jgg@mellanox.com>
Signed-off-by: Jason Gunthorpe <jgg@mellanox.com>

drivers/infiniband/core/security.c

@@ -426,7 +426,7 @@ int ib_create_qp_security(struct ib_qp *qp, struct ib_device *dev)
 	int ret;
 
 	rdma_for_each_port (dev, i) {
-		is_ib = rdma_protocol_ib(dev, i++);
+		is_ib = rdma_protocol_ib(dev, i);
 		if (is_ib)
 			break;
 	}