carl9170_mod_virtual_mac
int carl9170_mod_virtual_mac(struct ar9170 *ar, const unsigned int id,
err = carl9170_mod_virtual_mac(ar, old_main_priv->id,
err = carl9170_mod_virtual_mac(ar, vif_id, vif->addr);
WARN_ON(carl9170_mod_virtual_mac(ar, id, NULL));