drivers/net: const-ify ethtool_ops declarations

Signed-off-by: Jeff Garzik <jeff@garzik.org>

drivers/net/fealnx.c

@@ -440,7 +440,7 @@ static void set_rx_mode(struct net_device *dev);
 static void __set_rx_mode(struct net_device *dev);
 static struct net_device_stats *get_stats(struct net_device *dev);
 static int mii_ioctl(struct net_device *dev, struct ifreq *rq, int cmd);
-static struct ethtool_ops netdev_ethtool_ops;
+static const struct ethtool_ops netdev_ethtool_ops;
 static int netdev_close(struct net_device *dev);
 static void reset_rx_descriptors(struct net_device *dev);
 static void reset_tx_descriptors(struct net_device *dev);
@@ -1885,7 +1885,7 @@ static void netdev_set_msglevel(struct net_device *dev, u32 value)
 	debug = value;
 }
 
-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,