__bcm_phy_modify_exp
ret = __bcm_phy_modify_exp(phydev, BCM54XX_EXP_ECD_CTRL, mask, set);
EXPORT_SYMBOL_GPL(__bcm_phy_modify_exp);
ret = __bcm_phy_modify_exp(phydev, reg, mask, set);
int __bcm_phy_modify_exp(struct phy_device *phydev, u16 reg, u16 mask, u16 set);