MdePkg BaseSynchronizationLib: Convert X64/InterlockedDecrement.asm to NASM

The BaseTools/Scripts/ConvertMasmToNasm.py script was used to convert
X64/InterlockedDecrement.asm to X64/InterlockedDecrement.nasm

Contributed-under: TianoCore Contribution Agreement 1.0
Signed-off-by: Jordan Justen <jordan.l.justen@intel.com>

MdePkg/Library/BaseSynchronizationLib/BaseSynchronizationLib.inf

@@ -71,6 +71,7 @@
   X64/InterlockedIncrement.c | MSFT 
   SynchronizationMsc.c | MSFT 
 
+  X64/InterlockedDecrement.nasm| INTEL
   X64/InterlockedDecrement.asm | INTEL 
   X64/InterlockedIncrement.asm | INTEL 
   Synchronization.c | INTEL 

MdePkg/Library/BaseSynchronizationLib/X64/InterlockedDecrement.nasm

@@ -0,0 +1,39 @@
+;------------------------------------------------------------------------------
+;
+; Copyright (c) 2006, Intel Corporation. All rights reserved.<BR>
+; This program and the accompanying materials
+; are licensed and made available under the terms and conditions of the BSD License
+; which accompanies this distribution.  The full text of the license may be found at
+; http://opensource.org/licenses/bsd-license.php.
+;
+; THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
+; WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
+;
+; Module Name:
+;
+;   InterlockedDecrement.Asm
+;
+; Abstract:
+;
+;   InterlockedDecrement function
+;
+; Notes:
+;
+;------------------------------------------------------------------------------
+
+    DEFAULT REL
+    SECTION .text
+
+;------------------------------------------------------------------------------
+; UINT32
+; EFIAPI
+; InterlockedDecrement (
+;   IN      UINT32                    *Value
+;   );
+;------------------------------------------------------------------------------
+global ASM_PFX(InternalSyncDecrement)
+ASM_PFX(InternalSyncDecrement):
+    lock    dec     dword [rcx]
+    mov     eax, [rcx]
+    ret
+