drivers/net: const-ify ethtool_ops declarations

Signed-off-by: Jeff Garzik <jeff@garzik.org>
diff --git a/drivers/net/epic100.c b/drivers/net/epic100.c
index b885b20..ba2565e 100644
--- a/drivers/net/epic100.c
+++ b/drivers/net/epic100.c
@@ -299,7 +299,7 @@
 static int epic_poll(struct net_device *dev, int *budget);
 static irqreturn_t epic_interrupt(int irq, void *dev_instance, struct pt_regs *regs);
 static int netdev_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 epic_close(struct net_device *dev);
 static struct net_device_stats *epic_get_stats(struct net_device *dev);
 static void set_rx_mode(struct net_device *dev);
@@ -1492,7 +1492,7 @@
 	}
 }
 
-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,