LU-10560 osd: bi_bdev is replaced by bi_disk

The member bi_bdev is replaced by bi_disk in struct bio.
 - upstream commit: 74d46992e0d9dee7f1f376de0d56d31614c8a17a
   block:  replace bi_bdev with a gendisk pointer and partitions index

Signed-off-by: Yang Sheng <yang.sheng@intel.com>
Change-Id: Ice1fb53f8371fb744af5dbac6c076ce817770213
Reviewed-on: https://review.whamcloud.com/31975
Tested-by: Jenkins
Reviewed-by: Bob Glossman <bob.glossman@intel.com>
Tested-by: Maloo <hpdd-maloo@intel.com>
Reviewed-by: James Simmons <uja.ornl@yahoo.com>
Reviewed-by: Andreas Dilger <andreas.dilger@intel.com>