rtc: cpcap: 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.

Reviewed-by: Sebastian Reichel <sebastian.reichel@collabora.co.uk>
Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com>
diff --git a/drivers/rtc/rtc-cpcap.c b/drivers/rtc/rtc-cpcap.c
index 3a0333e..a8856f2 100644
--- a/drivers/rtc/rtc-cpcap.c
+++ b/drivers/rtc/rtc-cpcap.c
@@ -119,7 +119,7 @@
 
 	cpcap2rtc_time(tm, &cpcap_tm);
 
-	return rtc_valid_tm(tm);
+	return 0;
 }
 
 static int cpcap_rtc_set_time(struct device *dev, struct rtc_time *tm)