Add the EFI_RESOURCE_ATTRIBUTE_SPECIAL_PURPOSE resource attribute as per the PI 1.8 spec. This flag is used to indicate that the memory should be treated as special purpose memory (SPM). Cc: Liming Gao <gaoliming@byosoft.com.cn> Cc: Michael D Kinney <michael.d.kinney@intel.com> Signed-off-by: Michael Kubacki <michael.kubacki@microsoft.com>