EmulatorPkg/PeiTimerLib: Bug fix in NanoSecondDelay

REF: https://bugzilla.tianocore.org/show_bug.cgi?id=4339

Thunk->Sleep is expecting nanoseconds, no need to multiply by 100.

Cc: Andrew Fish <afish@apple.com>
Cc: Ray Ni <ray.ni@intel.com>
Signed-off-by: Deric Cole <deric.cole@intel.com>
Reviewed-by: Michael D Kinney <michael.d.kinney@intel.com>
Reviewed-by: Ray Ni <ray.ni@intel.com>

EmulatorPkg/Include/Protocol/EmuThunk.h

@@ -130,7 +130,7 @@ UINT64
 typedef
 VOID
 (EFIAPI *EMU_SLEEP)(
-  IN  UINT64    Milliseconds
+  IN  UINT64    Nanoseconds
   );
 
 typedef