HCI_LINK_POLICY_ENABLE_PARK_MODE
unit->hci_lmp_mask |= HCI_LINK_POLICY_ENABLE_PARK_MODE;
if (opt_park > 0) val |= HCI_LINK_POLICY_ENABLE_PARK_MODE;
if (opt_park < 0) val &= ~HCI_LINK_POLICY_ENABLE_PARK_MODE;
if (val & HCI_LINK_POLICY_ENABLE_PARK_MODE) tag("park");