ASoC: imx-pcm-rpmsg: Multi-channel support for sound card based on rpmsg

Some sound card based on rpmsg may support multi-channel. The number of
channels can be sent to Cortex-M in rpmsg for process.
Signed-off-by: Chancel Liu <chancel.liu@nxp.com>
Acked-by: Shengjiu Wang <shengjiu.wang@gmail.com>
Link: https://lore.kernel.org/r/20220930064441.2548505-5-chancel.liu@nxp.comSigned-off-by: Mark Brown <broonie@kernel.org>

sound/soc/fsl/imx-pcm-rpmsg.c

@@ -178,7 +178,7 @@ static int imx_rpmsg_pcm_hw_params(struct snd_soc_component *component,
 		msg->s_msg.param.channels = RPMSG_CH_STEREO;
 		break;
 	default:
-		ret = -EINVAL;
+		msg->s_msg.param.channels = params_channels(params);
 		break;
 	}