[PATCH 2/3] ASoC: soc-pcm: add soc_pcm_hw_update_chan()

[Pierre-Louis Bossart]

> We have soc_pcm_hw_update_rate() now.
> This patch creates same function for chan.
> 
> Signed-off-by: Kuninori Morimoto <kuninori.morimoto.gx at renesas.com>

This patch seems to break all SOF platforms. I tested manually to try 
and reproduce the CI results and it's indeed not so good:

root:~# speaker-test -Dhw:0,2 -c2 -r48000

speaker-test 1.2.4

Playback device is hw:0,2
Stream parameters are 48000Hz, S16_LE, 2 channels
Using 16 octaves of pink noise
Playback open error: -22,Invalid argument

Git bisect points to this patch as the first bad commit.

I reverted patch 3 and patch 2 in this series in our tests and the 
results are back to normal.

see https://github.com/thesofproject/linux/pull/2755

results with these two patches included:

https://sof-ci.01.org/linuxpr/PR2755/build5289/devicetest/

Results with these two patches reverted:

https://sof-ci.01.org/linuxpr/PR2755/build5290/devicetest/

I will not have the time to dig further before the middle of next week, 
but I wanted to share the information in case Morimoto-san, Ranjani or 
Kai have ideas on what might have gone wrong?