drivers/net: const-ify ethtool_ops declarations

Signed-off-by: Jeff Garzik <jeff@garzik.org>
diff --git a/drivers/net/pcmcia/smc91c92_cs.c b/drivers/net/pcmcia/smc91c92_cs.c
index 3fb369f..a2f3a0e 100644
--- a/drivers/net/pcmcia/smc91c92_cs.c
+++ b/drivers/net/pcmcia/smc91c92_cs.c
@@ -299,7 +299,7 @@
 static int mdio_read(struct net_device *dev, int phy_id, int loc);
 static void mdio_write(struct net_device *dev, int phy_id, int loc, int value);
 static int smc_link_ok(struct net_device *dev);
-static struct ethtool_ops ethtool_ops;
+static const struct ethtool_ops ethtool_ops;
 
 /*======================================================================
 
@@ -2207,7 +2207,7 @@
 		return -EOPNOTSUPP;
 }
 
-static struct ethtool_ops ethtool_ops = {
+static const struct ethtool_ops ethtool_ops = {
 	.begin = check_if_running,
 	.get_drvinfo = smc_get_drvinfo,
 	.get_settings = smc_get_settings,