UefiPayloadPkg/UefiPayloadEntry: Fix memory corruption

UefiPayloadEntry's AllocatePool() applies the "sizeof" operator to
HOB index rather than the HOB header structure. This yields 4 Bytes
compared to the 8 Bytes the structure header requires. Fix the call
to allocate the required space instead.

Reviewed-by: Guo Dong <guo.dong@intel.com>
Reviewed-by: Ray Ni <ray.ni@intel.com>
Cc: Maurice Ma <maurice.ma@intel.com>
Cc: Benjamin You <benjamin.you@intel.com>
Cc: Vitaly Cheptsov <vit9696@protonmail.com>
Signed-off-by: Marvin H?user <mhaeuser@posteo.de>

UefiPayloadPkg/UefiPayloadEntry/MemoryAllocation.c

@@ -163,7 +163,7 @@ AllocatePool (
     return NULL;
   }
 
-  Hob = (EFI_HOB_MEMORY_POOL *)CreateHob (EFI_HOB_TYPE_MEMORY_POOL, (UINT16)(sizeof (EFI_HOB_TYPE_MEMORY_POOL) + AllocationSize));
+  Hob = (EFI_HOB_MEMORY_POOL *)CreateHob (EFI_HOB_TYPE_MEMORY_POOL, (UINT16)(sizeof (EFI_HOB_MEMORY_POOL) + AllocationSize));
   return (VOID *)(Hob + 1);
 }