[NETFILTER]: fix cut-and-paste error in exit functions

Signed-off-by: Patrick McHardy <kaber@trash.net>
Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/net/netfilter/xt_connmark.c b/net/netfilter/xt_connmark.c
index 92a5726..a8f0305 100644
--- a/net/netfilter/xt_connmark.c
+++ b/net/netfilter/xt_connmark.c
@@ -147,7 +147,7 @@
 
 static void __exit xt_connmark_fini(void)
 {
-	xt_register_matches(xt_connmark_match, ARRAY_SIZE(xt_connmark_match));
+	xt_unregister_matches(xt_connmark_match, ARRAY_SIZE(xt_connmark_match));
 }
 
 module_init(xt_connmark_init);