block, bfq: remove useless parameter for bfq_add/del_bfqq_busy()

'bfqd' can be accessed through 'bfqq->bfqd', there is no need to pass
it as a parameter separately.

Signed-off-by: Yu Kuai <yukuai3@huawei.com>
Reviewed-by: Jan Kara <jack@suse.cz>
Link: https://lore.kernel.org/r/20220816015631.1323948-4-yukuai1@huaweicloud.com
Signed-off-by: Jens Axboe <axboe@kernel.dk>