[efi] Update to current EDK2 headers

Update to pick up the upstream commit bda715b ("MdePkg: Fix UINT64 and
INT64 word length for LoongArch64").

Signed-off-by: Michael Brown <mcb30@ipxe.org>

src/include/ipxe/efi/LoongArch64/ProcessorBind.h

@@ -30,8 +30,8 @@ FILE_LICENCE ( BSD2_PATENT );
 // Assume standard LoongArch 64-bit alignment.
 // Need to check portability of long long
 //
-typedef unsigned long   UINT64;
-typedef long            INT64;
+typedef unsigned long long  UINT64;
+typedef long long           INT64;
 typedef unsigned int        UINT32;
 typedef int                 INT32;
 typedef unsigned short      UINT16;

src/include/ipxe/efi/Pi/PiDxeCis.h

@@ -66,7 +66,7 @@ typedef enum {
   // /// EfiGcdMemoryTypeUnaccepted is defined in PrePiDxeCis.h because it has not been
   // /// defined in PI spec.
   // EfiGcdMemoryTypeUnaccepted,
-  EfiGcdMemoryTypeMaximum = 8
+  EfiGcdMemoryTypeMaximum = 7
 } EFI_GCD_MEMORY_TYPE;
 
 ///