Currently, if a MMI handler returns an unexpected failure status code, ASSERT (FALSE) is used. It is more useful to use ASSERT_EFI_ERROR() which also outputs the status code value. Signed-off-by: Michael Kubacki <michael.kubacki@microsoft.com> Reviewed-by: Laszlo Ersek <lersek@redhat.com> Reviewed-by: Ray Ni <ray.ni@intel.com>