NSE_CTRL
bcm_phy_write_exp(phydev, NSE_CTRL, ctrl);
bcm_phy_write_exp(phydev, NSE_CTRL, orig_ctrl);
bcm_phy_write_exp(phydev, NSE_CTRL, ctrl | NSE_CPU_FRAMESYNC);
bcm_phy_write_exp(priv->phydev, NSE_CTRL, priv->nse_ctrl);
bcm_phy_write_exp(phydev, NSE_CTRL, NSE_GMODE_EN | NSE_INIT);