netdev: drivers should make ethtool_ops const

No need to put ethtool_ops in data, they should be const.

Signed-off-by: Stephen Hemminger <shemminger@vyatta.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/drivers/net/veth.c b/drivers/net/veth.c
index d1941cd..ade5b34 100644
--- a/drivers/net/veth.c
+++ b/drivers/net/veth.c
@@ -129,7 +129,7 @@
 	return 0;
 }
 
-static struct ethtool_ops veth_ethtool_ops = {
+static const struct ethtool_ops veth_ethtool_ops = {
 	.get_settings		= veth_get_settings,
 	.get_drvinfo		= veth_get_drvinfo,
 	.get_link		= ethtool_op_get_link,