MRMAC1
u32 mrmac1 = ioread32(etha->addr + MRMAC1);
etha->addr + MRMAC1);
rtsn_write(priv, MRMAC1, (mac_addr[2] << 24) | (mac_addr[3] << 16) |
mrmac1 = rtsn_read(priv, MRMAC1);