blk-mq: pass a flags argument to blk_mq_add_to_requeue_list

Replace the boolean at_head argument with the same flags that are already
passed to blk_mq_insert_request.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Damien Le Moal <dlemoal@kernel.org>
Link: https://lore.kernel.org/r/20230413064057.707578-21-hch@lst.de


Signed-off-by: Jens Axboe <axboe@kernel.dk>