rtc: pl030: remove useless invalid alarm handling

The core will never pass an invalid alarm to .set_alarm, it is not
necessary to check for its validity.

Link: https://lore.kernel.org/r/20200306005730.38268-2-alexandre.belloni@bootlin.comSigned-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com>

drivers/rtc/rtc-pl030.c

@@ -46,11 +46,6 @@ static int pl030_set_alarm(struct device *dev, struct rtc_wkalrm *alrm)
 	unsigned long time;
 	int ret;
 
-	/*
-	 * At the moment, we can only deal with non-wildcarded alarm times.
-	 */
-	ret = rtc_valid_tm(&alrm->time);
-	if (ret == 0)
 	ret = rtc_tm_to_time(&alrm->time, &time);
 	if (ret == 0)
 		writel(time, rtc->base + RTC_MR);