In prep for using it as part of a func pointer delcaration in an upcoming patch. Change-Id: I3272c4e0f16a894b52a0601323c7d9148592ca3f Signed-off-by: paul luse <paul.e.luse@intel.com> Reviewed-on: https://review.gerrithub.io/c/spdk/spdk/+/467698 Tested-by: SPDK CI Jenkins <sys_sgci@intel.com> Reviewed-by: Shuhei Matsumoto <shuhei.matsumoto.xt@hitachi.com> Reviewed-by: Ben Walker <benjamin.walker@intel.com>