drivers/net: const-ify ethtool_ops declarations

Signed-off-by: Jeff Garzik <jeff@garzik.org>
diff --git a/drivers/net/smc911x.c b/drivers/net/smc911x.c
index 4438fe8..a621b17 100644
--- a/drivers/net/smc911x.c
+++ b/drivers/net/smc911x.c
@@ -1821,7 +1821,7 @@
 	 return SMC911X_EEPROM_LEN;
 }
 
-static struct ethtool_ops smc911x_ethtool_ops = {
+static const struct ethtool_ops smc911x_ethtool_ops = {
 	.get_settings	 = smc911x_ethtool_getsettings,
 	.set_settings	 = smc911x_ethtool_setsettings,
 	.get_drvinfo	 = smc911x_ethtool_getdrvinfo,