Inb5588ed684, and after ine19d78e607the mayority of the Zephyr modem drivers were changed to use the Zephyr native net_ prefixed types, but a few were missing. Without this fix/change the code still builds as we are by now setting CONFIG_NET_NAMESPACE_COMPAT_MODE. But when this is not set, things fail to build. Signed-off-by: Alberto Escolar Piedras <alberto.escolar.piedras@nordicsemi.no>