iio: adc: axp20x_adc: make use of regmap_set_bits()

Instead of using regmap_update_bits() and passing the mask twice, use
regmap_set_bits().
Suggested-by: Uwe Kleine-König <u.kleine-koenig@baylibre.com>
Signed-off-by: Trevor Gamblin <tgamblin@baylibre.com>
Acked-by: Uwe Kleine-König <u.kleine-koenig@baylibre.com>
Link: https://patch.msgid.link/20240617-review-v3-5-88d1338c4cca@baylibre.comSigned-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>

drivers/iio/adc/axp20x_adc.c

@@ -991,8 +991,7 @@ static int axp20x_probe(struct platform_device *pdev)
 	regmap_write(info->regmap, AXP20X_ADC_EN1, info->data->adc_en1_mask);
 
 	if (info->data->adc_en2_mask)
-		regmap_update_bits(info->regmap, AXP20X_ADC_EN2,
-				   info->data->adc_en2_mask,
+		regmap_set_bits(info->regmap, AXP20X_ADC_EN2,
 				info->data->adc_en2_mask);
 
 	/* Configure ADCs rate */