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/sfc/ethtool.c b/drivers/net/sfc/ethtool.c
index 997ea2a..45018f2 100644
--- a/drivers/net/sfc/ethtool.c
+++ b/drivers/net/sfc/ethtool.c
@@ -731,7 +731,7 @@
 }
 
 
-struct ethtool_ops efx_ethtool_ops = {
+const struct ethtool_ops efx_ethtool_ops = {
 	.get_settings		= efx_ethtool_get_settings,
 	.set_settings		= efx_ethtool_set_settings,
 	.get_drvinfo		= efx_ethtool_get_drvinfo,