Add a small helper function bdev_ocssd_get_zone_size() to get zone_size
directly from ocssd_bdev. We do not need to cache nvme_bdev to get
zone_size by this helper function.
Signed-off-by: Shuhei Matsumoto <shuhei.matsumoto.xt@hitachi.com>
Change-Id: I8a6fffac6efaff2cb4cc872c19d85e8e504c5622
Reviewed-on: https://review.spdk.io/gerrit/c/spdk/spdk/+/5561
Community-CI: Broadcom CI
Tested-by: SPDK CI Jenkins <sys_sgci@intel.com>
Reviewed-by: Changpeng Liu <changpeng.liu@intel.com>
Reviewed-by: Aleksey Marchuk <alexeymar@mellanox.com>