MdePkg: Replace Opcode with the corresponding instructions.

REF: https://bugzilla.tianocore.org/show_bug.cgi?id=3790

Replace Opcode with the corresponding instructions.
The code changes have been verified with CompareBuild.py tool, which
can be used to compare the results of two different EDK II builds to
determine if they generate the same binaries.
(tool link: https://github.com/mdkinney/edk2/tree/sandbox/CompareBuild)

Signed-off-by: Jason Lou <yun.lou@intel.com>
Cc: Michael D Kinney <michael.d.kinney@intel.com>
Reviewed-by: Liming Gao <gaoliming@byosoft.com.cn>
Cc: Zhiguang Liu <zhiguang.liu@intel.com>

MdePkg/Library/BaseMemoryLibMmx/X64/CopyMem.nasm

@@ -1,6 +1,6 @@
 ;------------------------------------------------------------------------------
 ;
-; Copyright (c) 2006, Intel Corporation. All rights reserved.<BR>
+; Copyright (c) 2006 - 2022, Intel Corporation. All rights reserved.<BR>
 ; SPDX-License-Identifier: BSD-2-Clause-Patent
 ;
 ; Module Name:
@@ -44,15 +44,15 @@ ASM_PFX(InternalMemCopyMem):
     and     r8, 7
     shr     rcx, 3                      ; rcx <- # of Qwords to copy
     jz      @CopyBytes
-    DB      0x49, 0xf, 0x7e, 0xc2         ; movd r10, mm0 (Save mm0 in r10)
+    movq    r10, mm0
 .1:
-    DB      0xf, 0x6f, 0x6               ; movd mm0, [rsi]
-    DB      0xf, 0xe7, 0x7              ; movntq [rdi], mm0
+    movq    mm0, [rsi]
+    movntq  [rdi], mm0
     add     rsi, 8
     add     rdi, 8
     loop    .1
     mfence
-    DB      0x49, 0xf, 0x6e, 0xc2         ; movd mm0, r10 (Restore mm0)
+    movq    mm0, r10
     jmp     @CopyBytes
 @CopyBackward:
     mov     rsi, r9                     ; rsi <- End of Source