Revert ("r8169: remove 1000/Half from supported modes")

This reverts commit a6851c61.
It was reported that RTL8111b successfully finishes 1000/Full autoneg
but no data flows. Reverting the original patch fixes the issue.
It seems to be a HW issue with the integrated RTL8211B PHY. This PHY
version used also e.g. on RTL8168d, so better revert the original patch.
Reported-by: Bernhard Held <berny156@gmx.de>
Signed-off-by: Heiner Kallweit <hkallweit1@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

drivers/net/ethernet/realtek/r8169_main.c

@@ -6136,10 +6136,7 @@ static int r8169_phy_connect(struct rtl8169_private *tp)
 	if (ret)
 		return ret;
 
-	if (tp->supports_gmii)
-		phy_remove_link_mode(phydev,
-				     ETHTOOL_LINK_MODE_1000baseT_Half_BIT);
-	else
+	if (!tp->supports_gmii)
 		phy_set_max_speed(phydev, SPEED_100);
 
 	phy_support_asym_pause(phydev);