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/netfilter/xt_tcpmss.c b/net/netfilter/xt_tcpmss.c
index 6771bf0..4791c7c 100644
--- a/net/netfilter/xt_tcpmss.c
+++ b/net/netfilter/xt_tcpmss.c
@@ -83,7 +83,7 @@
 static struct xt_match tcpmss_mt_reg[] __read_mostly = {
 	{
 		.name		= "tcpmss",
-		.family		= AF_INET,
+		.family		= NFPROTO_IPV4,
 		.match		= tcpmss_mt,
 		.matchsize	= sizeof(struct xt_tcpmss_match_info),
 		.proto		= IPPROTO_TCP,
@@ -91,7 +91,7 @@
 	},
 	{
 		.name		= "tcpmss",
-		.family		= AF_INET6,
+		.family		= NFPROTO_IPV6,
 		.match		= tcpmss_mt,
 		.matchsize	= sizeof(struct xt_tcpmss_match_info),
 		.proto		= IPPROTO_TCP,