ASoC: soc-pcm: Do Digital Mute for both CPU/Codec in same timing.

Digital Mute for CPU   is done at soc_pcm_close(), and
Digital Mute for Codec is done at soc_pcm_hw_free().
It is just confusable.
This patch do Digital Mute for both CPU/Codec in same timing.
Then, it cares DAI activity

Signed-off-by: Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>
Link: https://lore.kernel.org/r/87imjip9ty.wl-kuninori.morimoto.gx@renesas.com


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