MIIM_COMMAND_ADDR
xgene_enet_wr_mdio_csr(addr, MIIM_COMMAND_ADDR, val);
xgene_enet_wr_mdio_csr(addr, MIIM_COMMAND_ADDR, 0);
xgene_enet_wr_mdio_csr(addr, MIIM_COMMAND_ADDR, val);
xgene_enet_wr_mdio_csr(addr, MIIM_COMMAND_ADDR, 0);