1. Add the GLOBAL_REMOVE_IF_UNREFERENCED to globe variables which are used only in debug version;

2. Use ZeroMem to replace gBS->SetMem;
3. Remove marked code;
4. Add IsHub judgement in UsbPortReset function to following EFI1.1 spec;
5. Add brackets for macro definition

git-svn-id: https://edk2.svn.sourceforge.net/svnroot/edk2/trunk/edk2@1740 6f19259b-4bc3-4df7-8a09-765794883524

EdkModulePkg/Bus/Usb/UsbKb/Dxe/efikey.c

@@ -297,7 +297,6 @@ USBKeyboardDriverBindingStart (
       // We only care interrupt endpoint here
       //
       CopyMem (&UsbKeyboardDevice->IntEndpointDescriptor, &EndpointDescriptor, sizeof (EndpointDescriptor));
-      //UsbKeyboardDevice->IntEndpointDescriptor  = EndpointDescriptor;
       Found = TRUE;
     }
   }