[SCTP]: Make sure the chunk is off the transmitted list prior to freeing.

In a few instances, we need to remove the chunk from the transmitted list
prior to freeing it.  This is because the free code doesn't do that any
more and so we need to do it manually.

Signed-off-by: Vlad Yasevich <vladislav.yasevich@hp.com>

net/sctp/sm_make_chunk.c

@@ -3224,6 +3224,7 @@ int sctp_process_asconf_ack(struct sctp_association *asoc,
 	}
 
 	/* Free the cached last sent asconf chunk. */
+	list_del_init(&asconf->transmitted_list);
 	sctp_chunk_free(asconf);
 	asoc->addip_last_asconf = NULL;