pwm: iqs620a: Use regmap_clear_bits and regmap_set_bits where applicable

Found using coccinelle and the following semantic patch:

@@
expression map, reg, bits;
@@

- regmap_update_bits(map, reg, bits, bits)
+ regmap_set_bits(map, reg, bits)

@@
expression map, reg, bits;
@@

- regmap_update_bits(map, reg, bits, 0)
+ regmap_clear_bits(map, reg, bits)

Link: https://lore.kernel.org/r/20221115111347.3705732-4-u.kleine-koenig@pengutronix.deSigned-off-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de>
Signed-off-by: Thierry Reding <thierry.reding@gmail.com>

drivers/pwm/pwm-iqs620a.c

@@ -47,8 +47,8 @@ static int iqs620_pwm_init(struct iqs620_pwm_private *iqs620_pwm,
 	int ret;
 
 	if (!duty_scale)
-		return regmap_update_bits(iqs62x->regmap, IQS620_PWR_SETTINGS,
-					  IQS620_PWR_SETTINGS_PWM_OUT, 0);
+		return regmap_clear_bits(iqs62x->regmap, IQS620_PWR_SETTINGS,
+					 IQS620_PWR_SETTINGS_PWM_OUT);
 
 	ret = regmap_write(iqs62x->regmap, IQS620_PWM_DUTY_CYCLE,
 			   duty_scale - 1);