rtc: stop validating rtc_time in .read_time

The RTC core is always calling rtc_valid_tm after the read_time callback.
It is not necessary to call it just before returning from the callback.

Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com>
diff --git a/drivers/rtc/rtc-ds1302.c b/drivers/rtc/rtc-ds1302.c
index 43bcb17..2a88115 100644
--- a/drivers/rtc/rtc-ds1302.c
+++ b/drivers/rtc/rtc-ds1302.c
@@ -98,8 +98,7 @@ static int ds1302_rtc_get_time(struct device *dev, struct rtc_time *time)
 	time->tm_mon = bcd2bin(buf[RTC_ADDR_MON]) - 1;
 	time->tm_year = bcd2bin(buf[RTC_ADDR_YEAR]) + 100;
 
-	/* Time may not be set */
-	return rtc_valid_tm(time);
+	return 0;
 }
 
 static const struct rtc_class_ops ds1302_rtc_ops = {