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-pcap.c b/drivers/rtc/rtc-pcap.c
index c4433240..c05f524 100644
--- a/drivers/rtc/rtc-pcap.c
+++ b/drivers/rtc/rtc-pcap.c
@@ -95,7 +95,7 @@
 
 	rtc_time_to_tm(secs, tm);
 
-	return rtc_valid_tm(tm);
+	return 0;
 }
 
 static int pcap_rtc_set_mmss(struct device *dev, unsigned long secs)