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/atm/pvc.c b/net/atm/pvc.c
index d4c0245..a6e1fdb 100644
--- a/net/atm/pvc.c
+++ b/net/atm/pvc.c
@@ -137,7 +137,7 @@
 }
 
 
-static struct net_proto_family pvc_family_ops = {
+static const struct net_proto_family pvc_family_ops = {
 	.family = PF_ATMPVC,
 	.create = pvc_create,
 	.owner = THIS_MODULE,