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/korina.c b/drivers/net/korina.c
index 51ca54c..03199fa 100644
--- a/drivers/net/korina.c
+++ b/drivers/net/korina.c
@@ -743,7 +743,7 @@
 	return mii_link_ok(&lp->mii_if);
 }
 
-static struct ethtool_ops netdev_ethtool_ops = {
+static const struct ethtool_ops netdev_ethtool_ops = {
 	.get_drvinfo            = netdev_get_drvinfo,
 	.get_settings           = netdev_get_settings,
 	.set_settings           = netdev_set_settings,