This will enable us to add more flags without creating any extra hole. Signed-off-by: Shuhei Matsumoto <shuhei.matsumoto.xt@hitachi.com> Change-Id: I166e2bd3d116c8cebf75bfe4f290b390d9e3888e Reviewed-on: https://review.spdk.io/gerrit/c/spdk/spdk/+/9851 Tested-by: SPDK CI Jenkins <sys_sgci@intel.com> Community-CI: Broadcom CI <spdk-ci.pdl@broadcom.com> Reviewed-by: Aleksey Marchuk <alexeymar@mellanox.com> Reviewed-by: Ben Walker <benjamin.walker@intel.com>