UefiCpuPkg: RISC-V: MMU: Support Svpbmt extension

The GCD EFI_MEMORY_UC and EFI_MEMORY_WC memory attributes will be
supported when Svpbmt extension available.

Cc: Gerd Hoffmann <kraxel@redhat.com>
Cc: Laszlo Ersek <lersek@redhat.com>
Cc: Rahul Kumar <rahul1.kumar@intel.com>
Cc: Ray Ni <ray.ni@intel.com>
Signed-off-by: Tuan Phan <tphan@ventanamicro.com>
Reviewed-by: Sunil V L <sunilvl@ventanamicro.com>

UefiCpuPkg/Library/BaseRiscVMmuLib/BaseRiscVMmuLib.inf

@@ -28,3 +28,4 @@
 
 [Pcd]
   gUefiCpuPkgTokenSpaceGuid.PcdCpuRiscVMmuMaxSatpMode  ## CONSUMES
+  gEfiMdePkgTokenSpaceGuid.PcdRiscVFeatureOverride     ## CONSUMES