libcamera: clock_recovery: Use nanoseconds in addSample() FrameWallClock was recently changed to nanoseconds, and all users of ClockRecovery use SensorTimestamp directly, which is also in nanoseconds. Thus addSample() should also use nanoseconds. Fix this. Signed-off-by: Paul Elder <[email protected]> Reviewed-by: Barnabás Pőcze <[email protected]> Reviewed-by: Naushir Patuck <[email protected]> Tested-by: Naushir Patuck <[email protected]>