Vlv2TbltDevicePkg/BootScriptSaveDxe: save 64-bit LoopTimes

The BootScriptMemPoll() helper function does the following:

- pop LoopTimes from the variable argument list as UINT64, then truncate
  it to UINTN,

- pass the truncated value to S3BootScriptSaveMemPoll() as last argument.

The truncation to UINTN is now superfluous, thanks to the patch titled
"MdePkg, MdeModulePkg: S3BootScriptSaveMemPoll(): accept 64-bit
LoopTimes".

Cc: David Wei <david.wei@intel.com>
Cc: Mang Guo <mang.guo@intel.com>
Contributed-under: TianoCore Contribution Agreement 1.0
Signed-off-by: Laszlo Ersek <lersek@redhat.com>
Reviewed-by: "Yao, Jiewen" <jiewen.yao@intel.com>
Reviewed-by: Michael Kinney <michael.d.kinney@intel.com>

Vlv2TbltDevicePkg/BootScriptSaveDxe/ScriptSave.c

@@ -348,14 +348,14 @@ BootScriptMemPoll (
 
 **/
 EFI_STATUS
-BootScriptMemPoll (
+BootScriptMemPoll (
   IN VA_LIST                       Marker
   )
 {
   S3_BOOT_SCRIPT_LIB_WIDTH Width;
   UINT64                Address;
   UINT8                 *BitMask;
-  UINT8                 *BitValue;
+  UINT8                 *BitValue;
   UINTN                Duration;
   UINT64               LoopTimes;