netfilter: queue: use NFPROTO_ for queue callsites

af is an nfproto.
Signed-off-by: Jan Engelhardt <jengelh@medozas.de>

net/ipv4/netfilter/ip_queue.c

@@ -596,7 +596,7 @@ static int __init ip_queue_init(void)
 #ifdef CONFIG_SYSCTL
 	ipq_sysctl_header = register_sysctl_paths(net_ipv4_ctl_path, ipq_table);
 #endif
-	status = nf_register_queue_handler(PF_INET, &nfqh);
+	status = nf_register_queue_handler(NFPROTO_IPV4, &nfqh);
 	if (status < 0) {
 		printk(KERN_ERR "ip_queue: failed to register queue handler\n");
 		goto cleanup_sysctl;

net/ipv6/netfilter/ip6_queue.c

@@ -598,7 +598,7 @@ static int __init ip6_queue_init(void)
 #ifdef CONFIG_SYSCTL
 	ipq_sysctl_header = register_sysctl_paths(net_ipv6_ctl_path, ipq_table);
 #endif
-	status = nf_register_queue_handler(PF_INET6, &nfqh);
+	status = nf_register_queue_handler(NFPROTO_IPV6, &nfqh);
 	if (status < 0) {
 		printk(KERN_ERR "ip6_queue: failed to register queue handler\n");
 		goto cleanup_sysctl;

net/netfilter/nf_queue.c

@@ -204,10 +204,10 @@ int nf_queue(struct sk_buff *skb,
 				  queuenum);
 
 	switch (pf) {
-	case AF_INET:
+	case NFPROTO_IPV4:
 		skb->protocol = htons(ETH_P_IP);
 		break;
-	case AF_INET6:
+	case NFPROTO_IPV6:
 		skb->protocol = htons(ETH_P_IPV6);
 		break;
 	}