Using setup.sh with whitelisted only one disk, function
spdk_tgt_add_subsystem_conf skip this one disk.

Signed-off-by: Maciej Wawryk <maciejx.wawryk@intel.com>
Change-Id: I1f6d77cf20cc181935f95f2996da8e31c36d0ac1
Reviewed-on: https://review.spdk.io/gerrit/c/spdk/spdk/+/2232


Community-CI: Mellanox Build Bot
Tested-by: SPDK CI Jenkins <sys_sgci@intel.com>
Reviewed-by: Karol Latecki <karol.latecki@intel.com>
Reviewed-by: Shuhei Matsumoto <shuhei.matsumoto.xt@hitachi.com>
Reviewed-by: Tomasz Zawadzki <tomasz.zawadzki@intel.com>