rtc: omap: stop validating rtc_time in .set_time and .set_alarm

The RTC core is always validating the rtc_time struct before calling
.set_time or .set_alarm. It is not necessary to do it again.
Also, rtc_time_to_tm never generates an invalid rtc_tm (it can be out of
range though).
Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com>

drivers/rtc/rtc-omap.c

@@ -273,9 +273,6 @@ static int omap_rtc_alarm_irq_enable(struct device *dev, unsigned int enabled)
 /* this hardware doesn't support "don't care" alarm fields */
 static int tm2bcd(struct rtc_time *tm)
 {
-	if (rtc_valid_tm(tm) != 0)
-		return -EINVAL;
-
 	tm->tm_sec = bin2bcd(tm->tm_sec);
 	tm->tm_min = bin2bcd(tm->tm_min);
 	tm->tm_hour = bin2bcd(tm->tm_hour);