drivers/net: const-ify ethtool_ops declarations

Signed-off-by: Jeff Garzik <jeff@garzik.org>
diff --git a/drivers/net/bonding/bond_main.c b/drivers/net/bonding/bond_main.c
index 8b95123..850aae2 100644
--- a/drivers/net/bonding/bond_main.c
+++ b/drivers/net/bonding/bond_main.c
@@ -4130,7 +4130,7 @@
 	snprintf(drvinfo->fw_version, 32, "%d", BOND_ABI_VERSION);
 }
 
-static struct ethtool_ops bond_ethtool_ops = {
+static const struct ethtool_ops bond_ethtool_ops = {
 	.get_tx_csum		= ethtool_op_get_tx_csum,
 	.get_tso		= ethtool_op_get_tso,
 	.get_ufo		= ethtool_op_get_ufo,