int netdev_get_etheraddr(const struct netdev *, uint8_t mac[6]);
/* PHY interface. */
-int netdev_get_carrier(const struct netdev *, bool *carrier);
+bool netdev_get_carrier(const struct netdev *);
int netdev_get_features(struct netdev *,
uint32_t *current, uint32_t *advertised,
uint32_t *supported, uint32_t *peer);