netfilter: nf_tables: fix wrong type in transaction when replacing rules

In b380e5c ("netfilter: nf_tables: add message type to transactions"),
I used the wrong message type in the rule replacement case. The rule
that is replaced needs to be handled as a deleted rule.

Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>

net/netfilter/nf_tables_api.c

@@ -1792,7 +1792,7 @@ static int nf_tables_newrule(struct sock *nlsk, struct sk_buff *skb,
 
 	if (nlh->nlmsg_flags & NLM_F_REPLACE) {
 		if (nft_rule_is_active_next(net, old_rule)) {
-			trans = nft_trans_rule_add(&ctx, NFT_MSG_NEWRULE,
+			trans = nft_trans_rule_add(&ctx, NFT_MSG_DELRULE,
 						   old_rule);
 			if (trans == NULL) {
 				err = -ENOMEM;