vendorcode/intel/edk2/edk2-stable202111: Use fixed size struct elements

Fix the FSP headers and replace void pointers by fixed sized integers
depending on the used mode to compile the FSP.
Change request here:https://github.com/intel/FSP/issues/59

This is necessary to run on x86_64, as pointers have different size.
Add preprocessor error to warn that x86_64 FSP isn't supported by the
current code.

BUG=b:200113959
TEST=Verified on Meteor Lake platform, without any compilation error

Signed-off-by: Subrata Banik <subratabanik@google.com>
Change-Id: I1f33db43f7932cf6d165d0c70a0e2922dad00a09
Reviewed-on: https://review.coreboot.org/c/coreboot/+/62847
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Anil Kumar K <anil.kumar.k@intel.com>
Reviewed-by: Tim Wawrzynczak <twawrzynczak@chromium.org>

src/vendorcode/intel/edk2/edk2-stable202111/IntelFsp2Pkg/Include/FspEas/FspApi.h

@@ -128,6 +128,7 @@ typedef struct {
   UINT8                       Reserved1[20];
 } FSPT_ARCH_UPD;
 
+#if CONFIG(PLATFORM_USES_FSP2_X86_32)
 ///
 /// FSPM_ARCH_UPD Configuration.
 ///
@@ -141,12 +142,16 @@ typedef struct {
   /// Pointer to the non-volatile storage (NVS) data buffer.
   /// If it is NULL it indicates the NVS data is not available.
   ///
-  VOID                        *NvsBufferPtr;
+  /// Note: This ought to be VOID*, but that won't allow calling this binary on x86_64.
+  ///
+  UINT32                      NvsBufferPtr;
   ///
   /// Pointer to the temporary stack base address to be
   /// consumed inside FspMemoryInit() API.
   ///
-  VOID                        *StackBase;
+  /// Note: This ought to be VOID*, but that won't allow calling this binary on x86_64.
+  ///
+  UINT32                      StackBase;
   ///
   /// Temporary stack size to be consumed inside
   /// FspMemoryInit() API.
@@ -165,9 +170,14 @@ typedef struct {
   /// Optional event handler for the bootloader to be informed of events occurring during FSP execution.
   /// This value is only valid if Revision is >= 2.
   ///
-  FSP_EVENT_HANDLER           *FspEventHandler;
+  /// Note: This ought to be FSP_EVENT_HANDLER*, but that won't allow calling this binary on x86_64.
+  ///
+  UINT32                      FspEventHandler;
   UINT8                       Reserved1[4];
 } FSPM_ARCH_UPD;
+#else
+#error You need to implement this struct for x86_64 FSP
+#endif
 
 typedef struct {
   ///