PHY_BCOM_P_EXT_CTRL
xm_phy_write(hw, port, PHY_BCOM_P_EXT_CTRL, ext);
xm_phy_write(hw, port, PHY_BCOM_P_EXT_CTRL, PHY_B_PEC_LED_OFF);
xm_phy_write(hw, port, PHY_BCOM_P_EXT_CTRL, PHY_B_PEC_LED_ON);