MdePkg: Change complex DEBUG_CODE() to DEBUG_CODE_BEGIN/END()

REF: https://bugzilla.tianocore.org/show_bug.cgi?id=3767

Update use of DEBUG_CODE(Expression) if Expression is a complex code
block with if/while/for/case statements that use {}.

Cc: Andrew Fish <afish@apple.com>
Cc: Leif Lindholm <leif@nuviainc.com>
Cc: Michael Kubacki <michael.kubacki@microsoft.com>
Signed-off-by: Michael D Kinney <michael.d.kinney@intel.com>
Reviewed-by: Liming Gao <gaoliming@byosoft.com.cn>

MdePkg/Library/BasePeCoffGetEntryPointLib/PeCoffGetEntryPoint.c

@@ -334,7 +334,7 @@ PeCoffSearchImageBase (
 
   Pe32Data = 0;
 
-  DEBUG_CODE (
+  DEBUG_CODE_BEGIN ();
     EFI_IMAGE_DOS_HEADER                 *DosHdr;
     EFI_IMAGE_OPTIONAL_HEADER_PTR_UNION  Hdr;
 
@@ -376,7 +376,7 @@ PeCoffSearchImageBase (
       //
       Pe32Data -= PE_COFF_IMAGE_ALIGN_SIZE;
     }
-  );
+  DEBUG_CODE_END ();
 
   return Pe32Data;
 }