rtl8168_led_mod_ctrl
int rtl8168_led_mod_ctrl(struct rtl8169_private *tp, u16 mask, u16 val);
rtl8168_led_mod_ctrl(tp, RTL8168_LED_CTRL_OPTION2, 0);
rtl8168_led_mod_ctrl(tp, 0x000f << shift, 0);
return rtl8168_led_mod_ctrl(tp, 0x000f << shift, mode << shift);