drivers/net: const-ify ethtool_ops declarations

Signed-off-by: Jeff Garzik <jeff@garzik.org>
diff --git a/drivers/net/sunlance.c b/drivers/net/sunlance.c
index e4c8576..7767074 100644
--- a/drivers/net/sunlance.c
+++ b/drivers/net/sunlance.c
@@ -1318,7 +1318,7 @@
 	return 1;
 }
 
-static struct ethtool_ops sparc_lance_ethtool_ops = {
+static const struct ethtool_ops sparc_lance_ethtool_ops = {
 	.get_drvinfo		= sparc_lance_get_drvinfo,
 	.get_link		= sparc_lance_get_link,
 };