drivers/net: const-ify ethtool_ops declarations

Signed-off-by: Jeff Garzik <jeff@garzik.org>
diff --git a/drivers/net/pcmcia/axnet_cs.c b/drivers/net/pcmcia/axnet_cs.c
index c54f6a7..a8891a9 100644
--- a/drivers/net/pcmcia/axnet_cs.c
+++ b/drivers/net/pcmcia/axnet_cs.c
@@ -91,7 +91,7 @@
 static int axnet_open(struct net_device *dev);
 static int axnet_close(struct net_device *dev);
 static int axnet_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 irqreturn_t ei_irq_wrapper(int irq, void *dev_id, struct pt_regs *regs);
 static void ei_watchdog(u_long arg);
 static void axnet_reset_8390(struct net_device *dev);
@@ -671,7 +671,7 @@
 	strcpy(info->driver, "axnet_cs");
 }
 
-static struct ethtool_ops netdev_ethtool_ops = {
+static const struct ethtool_ops netdev_ethtool_ops = {
 	.get_drvinfo		= netdev_get_drvinfo,
 };