IB/cm: Reduce dependency on gid attribute ndev check

GID type to path record type conversion can be done directly based on port
type and gid attribute type.  There is no need to find out using indirect
way by its GID attribute's ndev field.
Signed-off-by: Parav Pandit <parav@mellanox.com>
Signed-off-by: Leon Romanovsky <leonro@mellanox.com>
Signed-off-by: Jason Gunthorpe <jgg@mellanox.com>

drivers/infiniband/core/cm.c

@@ -1985,11 +1985,12 @@ static int cm_req_handler(struct cm_work *work)
 	grh = rdma_ah_read_grh(&cm_id_priv->av.ah_attr);
 	gid_attr = grh->sgid_attr;
 
-	if (gid_attr && gid_attr->ndev) {
+	if (gid_attr &&
+	    rdma_protocol_roce(work->port->cm_dev->ib_device,
+			       work->port->port_num)) {
 		work->path[0].rec_type =
 			sa_conv_gid_to_pathrec_type(gid_attr->gid_type);
 	} else {
-		/* If no GID attribute or ndev is null, it is not RoCE. */
 		cm_path_set_rec_type(work->port->cm_dev->ib_device,
 				     work->port->port_num,
 				     &work->path[0],