The queue limits already have a 'chunk_sectors' setting, so
we should be presenting it via sysfs.
Signed-off-by: Hannes Reinecke <hare@suse.de>

[Damien: Updated Documentation/ABI/testing/sysfs-block]
Signed-off-by: Damien Le Moal <damien.lemoal@hgst.com>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Martin K. Petersen <martin.petersen@oracle.com>
Reviewed-by: Shaun Tancheff <shaun.tancheff@seagate.com>
Tested-by: Shaun Tancheff <shaun.tancheff@seagate.com>
Signed-off-by: Jens Axboe <axboe@fb.com>