blk-iocost: don't allow to configure bio based device

hulk inclusion
category: bugfix
bugzilla: 188033, https://gitee.com/openeuler/kernel/issues/I663ZP


CVE: NA

--------------------------------

iocost is based on rq_qos, which can only work for request based device,
thus it doesn't make sense to configure iocost for bio based device.

Signed-off-by: Yu Kuai <yukuai3@huawei.com>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Li Nan <linan122@huawei.com>
Reviewed-by: Hou Tao <houtao1@huawei.com>