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-max8998.c b/drivers/rtc/rtc-max8998.c
index 30804b0..d8c0f9b 100644
--- a/drivers/rtc/rtc-max8998.c
+++ b/drivers/rtc/rtc-max8998.c
@@ -120,7 +120,7 @@ static int max8998_rtc_read_time(struct device *dev, struct rtc_time *tm)
 
 	max8998_data_to_tm(data, tm);
 
-	return rtc_valid_tm(tm);
+	return 0;
 }
 
 static int max8998_rtc_set_time(struct device *dev, struct rtc_time *tm)