Implement get / set tso for forcedeth driver.

Signed-off-by: Zachary Amsden <zach@vmware.com>

Index: linux-2.6.17-rc/drivers/net/forcedeth.c
===================================================================
--- linux-2.6.17-rc.orig/drivers/net/forcedeth.c	2006-05-18 13:31:55.000000000 -0700
+++ linux-2.6.17-rc/drivers/net/forcedeth.c	2006-05-31 14:34:53.000000000 -0700
@@ -2615,6 +2615,21 @@ static int nv_nway_reset(struct net_devi
 	return ret;
 }
 
+static int nv_set_tso(struct net_device *dev, u32 value)
+{
+	struct fe_priv *np = netdev_priv(dev);
+	int ret;
+
+	spin_lock_irq(&np->lock);
+	if ((np->driver_data & DEV_HAS_CHECKSUM))
+		ret = ethtool_op_set_tso(dev, value);
+	else
+		ret = value ? -EOPNOTSUPP : 0;
+	spin_unlock_irq(&np->lock);
+
+	return ret;
+}
+
 static struct ethtool_ops ops = {
 	.get_drvinfo = nv_get_drvinfo,
 	.get_link = ethtool_op_get_link,
@@ -2626,6 +2641,8 @@ static struct ethtool_ops ops = {
 	.get_regs = nv_get_regs,
 	.nway_reset = nv_nway_reset,
 	.get_perm_addr = ethtool_op_get_perm_addr,
+	.get_tso = ethtool_op_get_tso,
+	.set_tso = nv_set_tso
 };
 
 static void nv_vlan_rx_register(struct net_device *dev, struct vlan_group *grp)