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-ds3232.c b/drivers/rtc/rtc-ds3232.c
index 0550f7b..7184e51 100644
--- a/drivers/rtc/rtc-ds3232.c
+++ b/drivers/rtc/rtc-ds3232.c
@@ -145,7 +145,7 @@ static int ds3232_read_time(struct device *dev, struct rtc_time *time)
 
 	time->tm_year = bcd2bin(year) + add_century;
 
-	return rtc_valid_tm(time);
+	return 0;
 }
 
 static int ds3232_set_time(struct device *dev, struct rtc_time *time)