netsec_mac_read
ret = netsec_mac_read(priv, GMAC_REG_BMR, &value);
ret = netsec_mac_read(priv, GMAC_REG_OMR, &value);
ret = netsec_mac_read(priv, GMAC_REG_OMR, &value);
ret = netsec_mac_read(priv, addr, &data);
ret = netsec_mac_read(priv, addr, &data);
ret = netsec_mac_read(priv, GMAC_REG_GDR, &data);