BZ: https://bugzilla.tianocore.org/show_bug.cgi?id=2598 All registers definition of DVSEC are defined as per the PCI Express Base Specification 4.0 chapter 7.9.6. Signed-off-by: Ashraf Javeed <ashraf.javeed@intel.com> Cc: Michael D Kinney <michael.d.kinney@intel.com> Cc: Liming Gao <liming.gao@intel.com> Cc: Zhiguang Liu <zhiguang.liu@intel.com> Reviewed-by: Zhiguang Liu <zhiguang.liu@intel.com> Reviewed-by: Liming Gao <liming.gao@intel.com>