PciIoMap () need to feedback the status of mIoMmuProtocol->SetAttribute () return value. REF: https://bugzilla.tianocore.org/show_bug.cgi?id=4652 Reviewed-by: Ray Ni <ray.ni@intel.com> Reviewed-by: Huang Jenny <jenny.huang@intel.com> Cc: Chiang Chris <chris.chiang@intel.com> Signed-off-by: Sheng Wei <w.sheng@intel.com>