MTL - Rex - Chrome - alsa conformance test rate error exceeds the limit for DMIC with 4 channel #4691

alsa conformance test is executed with 4 channel DMIC.

Issue is not observed with this test on I2S speaker or Headset.

More information on alsa conformance test
https://chromium.googlesource.com/chromiumos/platform/audiotest/+/HEAD/alsa_conformance_test.md

command used for verification on Rex chrome system.

alsa_conformance_test -C 'hw:0,99' -c 4 -f S32_LE --debug
output - act-dmic-rate-error-sku3-15668-23ww451.log

Result summary
number of recorders: 1
number of points: 1277
step average: 37.467085
step min: 4
step max: 52
step median: 48
step standard deviation: 17.585385
rate: 47998.531900
rate error: 17.757167
zero channels: 0 0 0 0
number of underrun: 0
number of overrun: 0

Above result shows that rate error exceeded the limit of 10. Hence the test is considered failed.

mtrace log and with dynamic logs and ipc4 messaging enabled kernel logs
dmesg-act-dmic-rate-error-sku1-23ww451.log
mtrace-act-dmic-rate-error-sku1-23ww451.log

mtrace showed this messages
--- 12 messages dropped ---
[ 1.112486] pipe: pipeline_new: pipeline new pipe_id 0 priority 0
[ 1.113965] ipc: ipc_cmd: rx : 0x40000004|0x306
[ 1.114300] dai_intel_dmic: dai_dmic_probe: dmic_probe()
[ 1.114396] dma: dma_get: dma_get() ID 0 sref = 1 busy channels 0
[ 1.114428] ipc: dai_config: comp:0 0x40000 dai_config() dai type = 2 index = 0 dd 0x40105e00
--- 12 messages dropped ---
[ 1.114806] dai_intel_dmic_nhlt: dai_dmic_set_config_nhlt: dmic_set_config_nhlt(): illegal CIC_CONTROL = 0x0000c001
[ 1.114840] dai_intel_dmic_nhlt: dai_dmic_set_config_nhlt: dmic_set_config_nhlt(): clkdiv = 16, mcic = 25, mfir_a = 2, len = 101
--- 3 messages dropped ---

Similar error observed in JSL - #2381 - But it was on I2S speaker amp.