After reorganization, pahole tells me that it can save 8 bytes for the structure. Change-Id: Iee3a5dcd47cbab9062492716c7f4ede133bd94fd Signed-off-by: Ziye Yang <ziye.yang@intel.com> Reviewed-on: https://review.gerrithub.io/c/spdk/spdk/+/460579 Tested-by: SPDK CI Jenkins <sys_sgci@intel.com> Reviewed-by: Shuhei Matsumoto <shuhei.matsumoto.xt@hitachi.com> Reviewed-by: Darek Stojaczyk <dariusz.stojaczyk@intel.com>