mfd: tps65910: Delete an unnecessary variable initialisation in four functions

The local variable "ret" will be set to an appropriate value a bit later.
Thus omit the explicit initialisation at the beginning.
Signed-off-by: Markus Elfring <elfring@users.sourceforge.net>
Signed-off-by: Lee Jones <lee.jones@linaro.org>

drivers/mfd/tps65910.c

@@ -229,7 +229,7 @@ static struct regmap_irq_chip tps65910_irq_chip = {
 static int tps65910_irq_init(struct tps65910 *tps65910, int irq,
 		    struct tps65910_platform_data *pdata)
 {
-	int ret = 0;
+	int ret;
 	static struct regmap_irq_chip *tps6591x_irqs_chip;
 
 	if (!irq) {
@@ -313,7 +313,7 @@ static int tps65910_sleepinit(struct tps65910 *tps65910,
 		struct tps65910_board *pmic_pdata)
 {
 	struct device *dev = NULL;
-	int ret = 0;
+	int ret;
 
 	dev = tps65910->dev;
 
@@ -383,7 +383,7 @@ static struct tps65910_board *tps65910_parse_dt(struct i2c_client *client,
 	struct tps65910_board *board_info;
 	unsigned int prop;
 	const struct of_device_id *match;
-	int ret = 0;
+	int ret;
 
 	match = of_match_device(tps65910_of_match, &client->dev);
 	if (!match) {
@@ -460,7 +460,7 @@ static int tps65910_i2c_probe(struct i2c_client *i2c,
 	struct tps65910_board *of_pmic_plat_data = NULL;
 	struct tps65910_platform_data *init_data;
 	unsigned long chip_id = id->driver_data;
-	int ret = 0;
+	int ret;
 
 	pmic_plat_data = dev_get_platdata(&i2c->dev);