nwam_walk_ncps
if (nwam_walk_ncps(active_ncp_callback, &active_ncp, 0, NULL)
ret = nwam_walk_ncps(list_ncp_cb, ofmt, 0, NULL);
ret = nwam_walk_ncps(destroy_ncp_callback, NULL, 0, NULL);
ret = nwam_walk_ncps(list_ncp_callback, &list_msg, 0,
ret = nwam_walk_ncps(export_ncp_callback, of, 0, NULL);
extern nwam_error_t nwam_walk_ncps(int (*)(nwam_ncp_handle_t, void *),