FirmwarePerformanceDxe.c utilizes the Timer Library function GetTimeInNanoSecond() which was not implemented by the ArmArchTimerLib. Contributed-under: TianoCore Contribution Agreement 1.0 Signed-off-by: Evan Lloyd <evan.lloyd@arm.com> Reviewed-by: Ryan Harkin <ryan.harkin@linaro.org> Reviewed-by: Ard Biesheuvel <ard.biesheuvel@linaro.org>