EDKII:Display engine should not depend on the framework code

Display engine base on class opcode to detect whether in
front page.Now remove class/subclass and use FormsetGuid
or ClassGuid to judge whether in front page

Contributed-under: TianoCore Contribution Agreement 1.0
Signed-off-by: Dandan Bi <dandan.bi@intel.com>
Reviewed-by: Liming Gao <liming.gao@intel.com>

git-svn-id: https://svn.code.sf.net/p/edk2/code/trunk/edk2@17590 6f19259b-4bc3-4df7-8a09-765794883524

MdeModulePkg/Universal/SetupBrowserDxe/Setup.h

@@ -454,6 +454,7 @@ typedef struct {
   UINT16                          Class;                // Tiano extended Class code
   UINT16                          SubClass;             // Tiano extended Subclass code
   EFI_IMAGE_ID                    ImageId;
+  EFI_IFR_OP_HEADER               *OpCode;              //mainly for formset op to get ClassGuid
 
   FORM_BROWSER_STATEMENT          *StatementBuffer;     // Buffer for all Statements and Questions
   EXPRESSION_OPCODE               *ExpressionBuffer;    // Buffer for all Expression OpCode