drivers/net: const-ify ethtool_ops declarations

Signed-off-by: Jeff Garzik <jeff@garzik.org>
diff --git a/drivers/net/tulip/uli526x.c b/drivers/net/tulip/uli526x.c
index c4c720e..0b176be 100644
--- a/drivers/net/tulip/uli526x.c
+++ b/drivers/net/tulip/uli526x.c
@@ -222,7 +222,7 @@
 static int uli526x_stop(struct net_device *);
 static struct net_device_stats * uli526x_get_stats(struct net_device *);
 static void uli526x_set_filter_mode(struct net_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 uli526x_interrupt(int, void *, struct pt_regs *);
 static void uli526x_descriptor_init(struct uli526x_board_info *, unsigned long);
@@ -985,7 +985,7 @@
 	wol->wolopts = 0;
 }
 
-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,
 	.get_link		= netdev_get_link,