rtc: ds3232: remove unused UIE code

UIE mode irqs are handled by the generic rtc core now.  But there are
remaining unused code fragments for it.
Signed-off-by: NAkinobu Mita <akinobu.mita@gmail.com>
Signed-off-by: NAlexandre Belloni <alexandre.belloni@free-electrons.com>

drivers/rtc/rtc-ds3232.c

@@ -279,32 +279,14 @@ static int ds3232_update_alarm(struct device *dev, unsigned int enabled)
 	struct ds3232 *ds3232 = dev_get_drvdata(dev);
 	int control;
 	int ret;
-	u8 buf[4];
 
 	mutex_lock(&ds3232->mutex);
 
-	ret = regmap_bulk_read(ds3232->regmap, DS3232_REG_ALARM1, buf, 4);
-	if (ret)
-		goto unlock;
-
-	buf[0] = bcd2bin(buf[0]) < 0 || (ds3232->rtc->irq_data & RTC_UF) ?
-								0x80 : buf[0];
-	buf[1] = bcd2bin(buf[1]) < 0 || (ds3232->rtc->irq_data & RTC_UF) ?
-								0x80 : buf[1];
-	buf[2] = bcd2bin(buf[2]) < 0 || (ds3232->rtc->irq_data & RTC_UF) ?
-								0x80 : buf[2];
-	buf[3] = bcd2bin(buf[3]) < 0 || (ds3232->rtc->irq_data & RTC_UF) ?
-								0x80 : buf[3];
-
-	ret = regmap_bulk_write(ds3232->regmap, DS3232_REG_ALARM1, buf, 4);
-	if (ret)
-		goto unlock;
-
 	ret = regmap_read(ds3232->regmap, DS3232_REG_CR, &control);
 	if (ret)
 		goto unlock;
 
-	if (enabled || (ds3232->rtc->irq_data & RTC_UF))
+	if (enabled)
 		/* enable alarm1 interrupt */
 		control |= DS3232_REG_CR_A1IE;
 	else