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/irda/af_irda.c b/net/irda/af_irda.c
index dd35641..9429e40 100644
--- a/net/irda/af_irda.c
+++ b/net/irda/af_irda.c
@@ -2463,7 +2463,7 @@
 	return 0;
 }
 
-static struct net_proto_family irda_family_ops = {
+static const struct net_proto_family irda_family_ops = {
 	.family = PF_IRDA,
 	.create = irda_create,
 	.owner	= THIS_MODULE,