ASoC: rt1015: Enable class-D silence and clock detections

Avoid noise under bypass boost mode.

Signed-off-by: derek.fang <derek.fang@realtek.com>
Link: https://lore.kernel.org/r/1590750310-30085-1-git-send-email-derek.fang@realtek.com


Signed-off-by: Mark Brown <broonie@kernel.org>