a58bfb37f6
Adjust FIFO threshold according to FIFO depth. Skip the adjustment if we do not have FIFO depth info. Contributed-under: TianoCore Contribution Agreement 1.0 Signed-off-by: Jun Nie <jun.nie@linaro.org> Acked-by: Haojian Zhuang <haojian.zhuang@linaro.org> Reviewed-by: Leif Lindholm <leif.lindholm@linaro.org>