ASoC: fsl_micfil: drop unused variables

struct fsl_micfil has unused fields, remove them.
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
Acked-by: Shengjiu Wang <shengjiu.wang@gmail.com>
Link: https://lore.kernel.org/r/20220414162249.3934543-9-s.hauer@pengutronix.deSigned-off-by: Mark Brown <broonie@kernel.org>

sound/soc/fsl/fsl_micfil.c

@@ -38,10 +38,7 @@ struct fsl_micfil {
 	unsigned int dataline;
 	char name[32];
 	int irq[MICFIL_IRQ_LINES];
-	unsigned int mclk_streams;
 	int quality;	/*QUALITY 2-0 bits */
-	bool slave_mode;
-	int channel_gain[8];
 };
 
 struct fsl_micfil_soc_data {
@@ -342,7 +339,6 @@ static int fsl_micfil_dai_probe(struct snd_soc_dai *cpu_dai)
 {
 	struct fsl_micfil *micfil = dev_get_drvdata(cpu_dai->dev);
 	int ret;
-	int i;
 
 	/* set qsel to medium */
 	ret = regmap_update_bits(micfil->regmap, REG_MICFIL_CTRL2,
@@ -353,8 +349,6 @@ static int fsl_micfil_dai_probe(struct snd_soc_dai *cpu_dai)
 
 	/* set default gain to max_gain */
 	regmap_write(micfil->regmap, REG_MICFIL_OUT_CTRL, 0x77777777);
-	for (i = 0; i < 8; i++)
-		micfil->channel_gain[i] = 0xF;
 
 	snd_soc_dai_init_dma_data(cpu_dai, NULL,
 				  &micfil->dma_params_rx);