drivers/net: const-ify ethtool_ops declarations

Signed-off-by: Jeff Garzik <jeff@garzik.org>
diff --git a/drivers/net/sunqe.c b/drivers/net/sunqe.c
index d5c1448..9202a1c 100644
--- a/drivers/net/sunqe.c
+++ b/drivers/net/sunqe.c
@@ -718,7 +718,7 @@
 	return (phyconfig & MREGS_PHYCONFIG_LSTAT);
 }
 
-static struct ethtool_ops qe_ethtool_ops = {
+static const struct ethtool_ops qe_ethtool_ops = {
 	.get_drvinfo		= qe_get_drvinfo,
 	.get_link		= qe_get_link,
 };