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/ks8842.c b/drivers/net/ks8842.c
index 6e74aa9..99e9541 100644
--- a/drivers/net/ks8842.c
+++ b/drivers/net/ks8842.c
@@ -619,7 +619,7 @@
 	.ndo_validate_addr	= eth_validate_addr
 };
 
-static struct ethtool_ops ks8842_ethtool_ops = {
+static const struct ethtool_ops ks8842_ethtool_ops = {
 	.get_link		= ethtool_op_get_link,
 };