netfilter: nf_hook_ops structs can be const

We no longer place these on a list so they can be const.

Signed-off-by: Florian Westphal <fw@strlen.de>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>

security/smack/smack_netfilter.c

@@ -58,7 +58,7 @@ static unsigned int smack_ipv4_output(void *priv,
 	return NF_ACCEPT;
 }
 
-static struct nf_hook_ops smack_nf_ops[] = {
+static const struct nf_hook_ops smack_nf_ops[] = {
 	{
 		.hook =		smack_ipv4_output,
 		.pf =		NFPROTO_IPV4,