netfilter: x_tables: use NFPROTO_* in extensions

Signed-off-by: Jan Engelhardt <jengelh@medozas.de>
Signed-off-by: Patrick McHardy <kaber@trash.net>
diff --git a/net/ipv6/netfilter/ip6t_eui64.c b/net/ipv6/netfilter/ip6t_eui64.c
index 8f331f1..ba38df1 100644
--- a/net/ipv6/netfilter/ip6t_eui64.c
+++ b/net/ipv6/netfilter/ip6t_eui64.c
@@ -60,7 +60,7 @@
 
 static struct xt_match eui64_mt6_reg __read_mostly = {
 	.name		= "eui64",
-	.family		= AF_INET6,
+	.family		= NFPROTO_IPV6,
 	.match		= eui64_mt6,
 	.matchsize	= sizeof(int),
 	.hooks		= (1 << NF_INET_PRE_ROUTING) | (1 << NF_INET_LOCAL_IN) |