ASoC: davinci-pcm, davinci-mcasp: Clean up active_serializers

As pointed of by Vaibhav, commit message: "ASoC: davinci-mcasp: Add support for multichannel playback"
number of active serializers can be hidden into fifo_level variable, which is set in davimci-mcasp.

Signed-off-by: Michal Bachraty <michal.bachraty@streamunlimited.com>
Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>

sound/soc/davinci/davinci-mcasp.c

@@ -834,17 +834,20 @@ static int davinci_mcasp_hw_params(struct snd_pcm_substream *substream,
 	int word_length;
 	u8 fifo_level;
 	u8 slots = dev->tdm_slots;
+	u8 active_serializers;
 	int channels;
 	struct snd_interval *pcm_channels = hw_param_interval(params,
 					SNDRV_PCM_HW_PARAM_CHANNELS);
 	channels = pcm_channels->min;
 
+	active_serializers = (channels + slots - 1) / slots;
+
 	if (davinci_hw_common_param(dev, substream->stream, channels) == -EINVAL)
 		return -EINVAL;
 	if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
-		fifo_level = dev->txnumevt;
+		fifo_level = dev->txnumevt * active_serializers;
 	else
-		fifo_level = dev->rxnumevt;
+		fifo_level = dev->rxnumevt * active_serializers;
 
 	if (dev->op_mode == DAVINCI_MCASP_DIT_MODE)
 		davinci_hw_dit_param(dev);
@@ -889,7 +892,6 @@ static int davinci_mcasp_hw_params(struct snd_pcm_substream *substream,
 		dma_params->acnt = dma_params->data_type;
 
 	dma_params->fifo_level = fifo_level;
-	dma_params->active_serializers = (channels + slots - 1) / slots;
 	davinci_config_channel_size(dev, word_length);
 
 	return 0;