rx_disable
u8 rx_disable;
mac_ops->rx_disable(pdata);
.rx_disable = xgene_gmac_rx_disable,
mac_ops->rx_disable(pdata);
void (*rx_disable)(struct xgene_enet_pdata *pdata);
.rx_disable = xgene_sgmac_rx_disable,
.rx_disable = xgene_xgmac_rx_disable,
rx_disable(port);