forcedeth: ethtool tx csum fix

This patch fixes the ethtool tx csum "set" command. A recent patch was
submitted to remove HW_CSUM and use IP_CSUM instead. Therefore, the
corresponding ethtool command should also be modified.
Signed-off-by: NAyaz Abdulla <aabdulla@nvidia.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

drivers/net/forcedeth.c

@@ -4763,7 +4763,7 @@ static int nv_set_tx_csum(struct net_device *dev, u32 data)
 	struct fe_priv *np = netdev_priv(dev);
 
 	if (np->driver_data & DEV_HAS_CHECKSUM)
-		return ethtool_op_set_tx_hw_csum(dev, data);
+		return ethtool_op_set_tx_csum(dev, data);
 	else
 		return -EOPNOTSUPP;
 }