rtc: stop validating rtc_time after rtc_time_to_tm

rtc_time_to_tm never generates an invalid tm. It is not necessary to
validate it.

Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com>
diff --git a/drivers/rtc/rtc-lpc32xx.c b/drivers/rtc/rtc-lpc32xx.c
index 887871c..3ba8723 100644
--- a/drivers/rtc/rtc-lpc32xx.c
+++ b/drivers/rtc/rtc-lpc32xx.c
@@ -70,7 +70,7 @@ static int lpc32xx_rtc_read_time(struct device *dev, struct rtc_time *time)
 	elapsed_sec = rtc_readl(rtc, LPC32XX_RTC_UCOUNT);
 	rtc_time_to_tm(elapsed_sec, time);
 
-	return rtc_valid_tm(time);
+	return 0;
 }
 
 static int lpc32xx_rtc_set_mmss(struct device *dev, unsigned long secs)