MII_BCM54XX_EXP_SEL
rc = __phy_write(phydev, MII_BCM54XX_EXP_SEL, reg);
val = __phy_write(phydev, MII_BCM54XX_EXP_SEL, reg);
__phy_write(phydev, MII_BCM54XX_EXP_SEL, 0);
ret = __phy_write(phydev, MII_BCM54XX_EXP_SEL, reg);