The include guard is incomplete and does not define the macro. Cc: Michael D Kinney <michael.d.kinney@intel.com> Cc: Liming Gao <gaoliming@byosoft.com.cn> Cc: Zhiguang Liu <zhiguang.liu@intel.com> Cc: Rebecca Cran <rebecca@bsdio.com> Signed-off-by: Michael Kubacki <michael.kubacki@microsoft.com> Reviewed-by: Rebecca Cran <rebecca@os.amperecomputing.com> Reviewed-by: Michael D Kinney <michael.d.kinney@intel.com> Reviewed-by: Liming Gao <gaoliming@byosoft.com.cn>