rtc: rtc-s3c: add rtc_valid_tm in s3c_rtc_gettime()

Add "rtc_valid_tm" in s3c_rtc_gettime() as per Wan ZongShun's suggestion.
Suggested-by: Wan ZongShun <mcuos.com@gmail.com>
Signed-off-by: Kukjin Kim <kgene.kim@samsung.com>
Cc: Ben Dooks <ben-linux@fluff.org>
Cc: Alessandro Zummo <a.zummo@towertech.it>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

drivers/rtc/rtc-s3c.c

@@ -185,7 +185,7 @@ static int s3c_rtc_gettime(struct device *dev, struct rtc_time *rtc_tm)
 	rtc_tm->tm_year += 100;
 	rtc_tm->tm_mon -= 1;
 
-	return 0;
+	return rtc_valid_tm(rtc_tm);
 }
 
 static int s3c_rtc_settime(struct device *dev, struct rtc_time *tm)