ASoC: SOF: add be_hw_params_fixup() for ALH

Fixup BE DAI links channel count to match topology settings. Normally the
channel count of BE is equal to FE's so we don't have any issue. For some
cases like DSM with 2-channel FE and 4-channel BE the mismatch of BE and
topology will result in audio issues.
Signed-off-by: Rander Wang <rander.wang@intel.com>
Reviewed-by: Keyon Jie <yang.jie@intel.com>
Signed-off-by: Kai Vehmanen <kai.vehmanen@linux.intel.com>
Link: https://lore.kernel.org/r/20210201092345.1214232-1-kai.vehmanen@linux.intel.comSigned-off-by: Mark Brown <broonie@kernel.org>

sound/soc/sof/pcm.c

@@ -707,7 +707,12 @@ int sof_pcm_dai_link_fixup(struct snd_soc_pcm_runtime *rtd, struct snd_pcm_hw_pa
 		}
 		break;
 	case SOF_DAI_INTEL_ALH:
-		/* do nothing for ALH dai_link */
+		/*
+		 * Dai could run with different channel count compared with
+		 * front end, so get dai channel count from topology
+		 */
+		channels->min = dai->dai_config->alh.channels;
+		channels->max = dai->dai_config->alh.channels;
 		break;
 	case SOF_DAI_IMX_ESAI:
 		rate->min = dai->dai_config->esai.fsync_rate;