ksz8_port_setup
ksz8_port_setup(dev, dev->cpu_port, true);
void ksz8_port_setup(struct ksz_device *dev, int port, bool cpu_port);
.port_setup = ksz8_port_setup,
.port_setup = ksz8_port_setup,
.port_setup = ksz8_port_setup,