SecurityPkg SecureBootConfigDxe: Add check for the external PE/COFF image.

Use BasePeCoffLib PeCoffLoaderGetImageInfo() to check the PE/COFF image.

In V2, add specific ImageRead() to make sure the PE/COFF image content
read is within the image buffer.

Contributed-under: TianoCore Contribution Agreement 1.0
Signed-off-by: Liming Gao <liming.gao@intel.com>
Reviewed-by: Jiewen Yao <jiewen.yao@intel.com>
Reviewed-by: Chao Zhang <chao.b.zhang@intel.com>

SecurityPkg/VariableAuthenticated/SecureBootConfigDxe/SecureBootConfigImpl.h

@@ -40,6 +40,7 @@ WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
 #include <Library/PlatformSecureLib.h>
 #include <Library/BaseCryptLib.h>
 #include <Library/FileExplorerLib.h>
+#include <Library/PeCoffLib.h>
 
 #include <Guid/MdeModuleHii.h>
 #include <Guid/AuthenticatedVariableFormat.h>