Correct a bug in AsmCpuidEx() to return correct ECX and EDX.

Signed-off-by: Ruiyu Ni <ruiyu.ni@intel.com>
Reviewed-by: Jeff Fan <jeff.fan@intel.com>

git-svn-id: https://edk2.svn.sourceforge.net/svnroot/edk2/trunk/edk2@13359 6f19259b-4bc3-4df7-8a09-765794883524

MdePkg/Library/BaseLib/Ia32/CpuIdEx.asm

@@ -1,6 +1,6 @@
 ;------------------------------------------------------------------------------
 ;
-; Copyright (c) 2006 - 2008, Intel Corporation. All rights reserved.<BR>
+; Copyright (c) 2006 - 2012, 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
@@ -52,13 +52,13 @@ AsmCpuidEx  PROC    USES    ebx
     jecxz   @F
     mov     [ecx], ebx
 @@:
-    mov     ecx, [ebp + 28]
-    jecxz   @F
-    pop     [ecx]
-@@:
-    mov     edx, [ebp + 32]
+    mov     ecx, [ebp + 32]
     jecxz   @F
     mov     [ecx], edx
+@@:
+    mov     edx, [ebp + 28]
+    jecxz   @F
+    pop     [ecx]
 @@:
     mov     eax, [ebp + 12]
     leave