netfilter: nf_tables: rename nf_table_delrule_by_chain()

For the sake of homogenize the function naming scheme, let's rename
nf_table_delrule_by_chain() to nft_delrule_by_chain().
Signed-off-by: Arturo Borrero Gonzalez <arturo.borrero.glez@gmail.com>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>

net/netfilter/nf_tables_api.c

@@ -1902,7 +1902,7 @@ static int nft_delrule(struct nft_ctx *ctx, struct nft_rule *rule)
 	return 0;
 }
 
-static int nf_table_delrule_by_chain(struct nft_ctx *ctx)
+static int nft_delrule_by_chain(struct nft_ctx *ctx)
 {
 	struct nft_rule *rule;
 	int err;
@@ -1955,12 +1955,12 @@ static int nf_tables_delrule(struct sock *nlsk, struct sk_buff *skb,
 
 			err = nft_delrule(&ctx, rule);
 		} else {
-			err = nf_table_delrule_by_chain(&ctx);
+			err = nft_delrule_by_chain(&ctx);
 		}
 	} else {
 		list_for_each_entry(chain, &table->chains, list) {
 			ctx.chain = chain;
-			err = nf_table_delrule_by_chain(&ctx);
+			err = nft_delrule_by_chain(&ctx);
 			if (err < 0)
 				break;
 		}