net: mark net_proto_ops as const

All usages of structure net_proto_ops should be declared const.

Signed-off-by: Stephen Hemminger <shemminger@vyatta.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/net/ipv6/af_inet6.c b/net/ipv6/af_inet6.c
index da36497..9421651 100644
--- a/net/ipv6/af_inet6.c
+++ b/net/ipv6/af_inet6.c
@@ -552,7 +552,7 @@
 #endif
 };
 
-static struct net_proto_family inet6_family_ops = {
+static const struct net_proto_family inet6_family_ops = {
 	.family = PF_INET6,
 	.create = inet6_create,
 	.owner	= THIS_MODULE,