Currently, there are code to set memory attribute in CpuMpPei module. However, the code doesn't handle the case of 5 level paging. Use the CpuPageTableLib to set memory attribute for two purpose: 1. Add 5 level paging support 2. Clean up code Reviewed-by: Ray Ni <ray.ni@intel.com> Cc: Rahul Kumar <rahul1.kumar@intel.com> Cc: Gerd Hoffmann <kraxel@redhat.com> Cc: Laszlo Ersek <lersek@redhat.com> Signed-off-by: Zhiguang Liu <zhiguang.liu@intel.com>