MAHR
u32 mahr = ravb_read(ndev, MAHR);
(ndev->dev_addr[2] << 8) | (ndev->dev_addr[3]), MAHR);
(ndev->dev_addr[2] << 8) | (ndev->dev_addr[3]), MAHR);
(ndev->dev_addr[2] << 8) | (ndev->dev_addr[3]), MAHR);
u32 mahr = sh_eth_read(ndev, MAHR);
[MAHR] = 0x03c0,
add_reg(MAHR);
[MAHR] = 0x01c0,
[MAHR] = 0x0170,
[MAHR] = 0x05c0,