rtc: s5m: replace regmap_update_bits with regmap_clear/set_bits

The regmap_clear_bits() and regmap_set_bits() helper macros state the
intention a bit more obviously.

Use those.

Reviewed-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
Signed-off-by: André Draszik <andre.draszik@linaro.org>
Link: https://lore.kernel.org/r/20250409-s2mpg10-v4-30-d66d5f39b6bf@linaro.org
Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com>

Author: andred

drivers/rtc/rtc-s5m.c

@@ -338,8 +338,8 @@ static int s5m8767_rtc_set_alarm_reg(struct s5m_rtc_info *info)
 
 	/* On S2MPS13 the AUDR is not auto-cleared */
 	if (info->device_type == S2MPS13X)
-		regmap_update_bits(info->regmap, info->regs->udr_update,
-				   S2MPS13_RTC_AUDR_MASK, 0);
+		regmap_clear_bits(info->regmap, info->regs->udr_update,
+				  S2MPS13_RTC_AUDR_MASK);
 
 	return ret;
 }
@@ -351,10 +351,8 @@ static int s5m_rtc_read_time(struct device *dev, struct rtc_time *tm)
 	int ret;
 
 	if (info->regs->read_time_udr_mask) {
-		ret = regmap_update_bits(info->regmap,
-				info->regs->udr_update,
-				info->regs->read_time_udr_mask,
-				info->regs->read_time_udr_mask);
+		ret = regmap_set_bits(info->regmap, info->regs->udr_update,
+				      info->regs->read_time_udr_mask);
 		if (ret) {
 			dev_err(dev,
 				"Failed to prepare registers for time reading: %d\n",