drivers/net: const-ify ethtool_ops declarations

Signed-off-by: Jeff Garzik <jeff@garzik.org>
diff --git a/drivers/net/starfire.c b/drivers/net/starfire.c
index 525b098..337c3b7 100644
--- a/drivers/net/starfire.c
+++ b/drivers/net/starfire.c
@@ -642,7 +642,7 @@
 static int	netdev_ioctl(struct net_device *dev, struct ifreq *rq, int cmd);
 static int	netdev_close(struct net_device *dev);
 static void	netdev_media_change(struct net_device *dev);
-static struct ethtool_ops ethtool_ops;
+static const struct ethtool_ops ethtool_ops;
 
 
 #ifdef VLAN_SUPPORT
@@ -1868,7 +1868,7 @@
 	debug = val;
 }
 
-static struct ethtool_ops ethtool_ops = {
+static const struct ethtool_ops ethtool_ops = {
 	.begin = check_if_running,
 	.get_drvinfo = get_drvinfo,
 	.get_settings = get_settings,