ng_hci_lp_discon_ind
ng_hci_lp_discon_ind(con, 0x16);
error = ng_hci_lp_discon_ind(con, ep->reason);
ng_hci_lp_discon_ind(con, reason);
int ng_hci_lp_discon_ind (ng_hci_unit_con_p, int);