Stress test: ipc error when playback and capture(through DMIC) at the same time.

[ZhendanYang]

This issue happens when running playback and capture at same time and run capture through dmic.
but we can rerun aplay and arecord after ipc error happened.

The reproducibility is almost 100%.
How to reproduce:
1.start playback and capture at same time
aplay -D hw:0,5 -c 2 -r 48000 -f s16_le /dev/zero -d 3 & arecord -D hw:0,6 c 4 -r 48000 -f s32_le
/dev/null -vv -i -d 3
2.repeat step 1.

Environment:
on UP^2
sof-dev: 08f7ddbcdd7eb4fcbf43cef09272215ef53dba7c
sof: af84ef2
soft: cfff9e0
tplg file name: sof-apl-nocodec.tplg
log:
dmesg.log
memorywindow.log
rmbox.log

[keqiaozhang]

Close this bug, we cannot reproduce this issue with 2ch DMIC and topology doesn't support 4ch so far. we will test with 4ch after this feature is enabled in tplg.