UefiCpuPkg/SecCore: SecPlatformInformation(2) are optional PPIs

Currently, this is ASSERT() if neither SecPlatformInformation2 nor
SecPlatformInformation PPIs are found. This is not correct. Per PI specification
both of them are optional PPI. Platform may not install them.

Cc: Michael Kinney <michael.d.kinney@intel.com>
Cc: Feng Tian <feng.tian@intel.com>
Contributed-under: TianoCore Contribution Agreement 1.0
Signed-off-by: Jeff Fan <jeff.fan@intel.com>
Reviewed-by: Michael Kinney <michael.d.kinney@intel.com>

UefiCpuPkg/SecCore/SecBist.c

@@ -261,6 +261,8 @@ RepublishSecPlatformInformationPpi (
                  SecInformationDescriptor,
                  &mPeiSecPlatformInformation
                  );
+    } else if (Status == EFI_NOT_FOUND) {
+      return;
     }
   }