rtc: r7301: 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>

drivers/rtc/rtc-r7301.c

@@ -224,7 +224,7 @@ static int rtc7301_read_time(struct device *dev, struct rtc_time *tm)
 
 	spin_unlock_irqrestore(&priv->lock, flags);
 
-	return err ? err : rtc_valid_tm(tm);
+	return err;
 }
 
 static int rtc7301_set_time(struct device *dev, struct rtc_time *tm)