ASoC: mt6359-accdet.c: remove useless assignments

cppcheck warnings (and additional issue found by code inspection)

sound/soc/codecs/mt6359-accdet.c:464:10: style: Variable 'ret' is
assigned a value that is never used. [unreadVariable]
 int ret = 0;
         ^
Signed-off-by: Pierre-Louis Bossart <pierre-louis.bossart@linux.intel.com>
Link: https://lore.kernel.org/r/20210804192456.278702-3-pierre-louis.bossart@linux.intel.comSigned-off-by: Mark Brown <broonie@kernel.org>

sound/soc/codecs/mt6359-accdet.c

@@ -234,7 +234,7 @@ static void recover_eint_setting(struct mt6359_accdet *priv)
 
 static void mt6359_accdet_recover_jd_setting(struct mt6359_accdet *priv)
 {
-	int ret = 0;
+	int ret;
 	unsigned int value = 0;
 
 	regmap_update_bits(priv->regmap, ACCDET_IRQ_ADDR,
@@ -461,7 +461,7 @@ static irqreturn_t mt6359_accdet_irq(int irq, void *data)
 {
 	struct mt6359_accdet *priv = data;
 	unsigned int irq_val = 0, val = 0, value = 0;
-	int ret = 0;
+	int ret;
 
 	mutex_lock(&priv->res_lock);
 	regmap_read(priv->regmap, ACCDET_IRQ_ADDR, &irq_val);
@@ -551,7 +551,7 @@ static irqreturn_t mt6359_accdet_irq(int irq, void *data)
 
 static int mt6359_accdet_parse_dt(struct mt6359_accdet *priv)
 {
-	int ret = 0;
+	int ret;
 	struct device *dev = priv->dev;
 	struct device_node *node = NULL;
 	int pwm_deb[15] = {0};
@@ -926,7 +926,7 @@ static int mt6359_accdet_probe(struct platform_device *pdev)
 {
 	struct mt6359_accdet *priv;
 	struct mt6397_chip *mt6397 = dev_get_drvdata(pdev->dev.parent);
-	int ret = 0;
+	int ret;
 
 	dev_dbg(&pdev->dev, "%s(), dev name %s\n",
 		__func__, dev_name(&pdev->dev));