CorebootPayloadPkg: Avoid page table memory allocation failure

Enable use of 1GB pages to avoid page table memory allocation failure.
The failure occurs when allocating enough 4KB pages to map a large
virtual address space, such as the 48-bit virtual address space of AMD
family 10h and family 15h processors. The change is needed only for the
X64 build because page tables are not used by the IA32 build.

Contributed-under: TianoCore Contribution Agreement 1.0
Signed-off-by: Scott Duplichan <scott@notabs.org>
---

Index: CorebootPayloadPkg/CorebootPayloadPkgX64.dsc
===================================================================
--- CorebootPayloadPkg/CorebootPayloadPkgX64.dsc	(revision 17108)
+++ CorebootPayloadPkg/CorebootPayloadPkgX64.dsc	(working copy)
@@ -210,6 +210,7 @@
   gEfiMdeModulePkgTokenSpaceGuid.PcdVariableStoreSize|0x10000
   
   gEfiMdeModulePkgTokenSpaceGuid.PcdVpdBaseAddress|0x0  
+  gEfiMdeModulePkgTokenSpaceGuid.PcdUse1GPageTable|TRUE
 
 !if $(SOURCE_DEBUG_ENABLE)
   gEfiSourceLevelDebugPkgTokenSpaceGuid.PcdDebugLoadImageMethod|0x2