drivers/net: const-ify ethtool_ops declarations

Signed-off-by: Jeff Garzik <jeff@garzik.org>
diff --git a/drivers/net/tulip/dmfe.c b/drivers/net/tulip/dmfe.c
index 66dade5..ccf2c225 100644
--- a/drivers/net/tulip/dmfe.c
+++ b/drivers/net/tulip/dmfe.c
@@ -298,7 +298,7 @@
 static int dmfe_stop(struct DEVICE *);
 static struct net_device_stats * dmfe_get_stats(struct DEVICE *);
 static void dmfe_set_filter_mode(struct DEVICE *);
-static struct ethtool_ops netdev_ethtool_ops;
+static const struct ethtool_ops netdev_ethtool_ops;
 static u16 read_srom_word(long ,int);
 static irqreturn_t dmfe_interrupt(int , void *, struct pt_regs *);
 #ifdef CONFIG_NET_POLL_CONTROLLER
@@ -1048,7 +1048,7 @@
 			dev->base_addr, dev->irq);
 }
 
-static struct ethtool_ops netdev_ethtool_ops = {
+static const struct ethtool_ops netdev_ethtool_ops = {
 	.get_drvinfo		= netdev_get_drvinfo,
 };