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/bluetooth/hidp/sock.c b/net/bluetooth/hidp/sock.c
index 37c9d7d..4beb6a7 100644
--- a/net/bluetooth/hidp/sock.c
+++ b/net/bluetooth/hidp/sock.c
@@ -268,7 +268,7 @@
 	return 0;
 }
 
-static struct net_proto_family hidp_sock_family_ops = {
+static const struct net_proto_family hidp_sock_family_ops = {
 	.family	= PF_BLUETOOTH,
 	.owner	= THIS_MODULE,
 	.create	= hidp_sock_create