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>

drivers/rtc/rtc-wm831x.c

@@ -156,7 +156,7 @@ static int wm831x_rtc_readtime(struct device *dev, struct rtc_time *tm)
 			u32 time = (time1[0] << 16) | time1[1];
 
 			rtc_time_to_tm(time, tm);
-			return rtc_valid_tm(tm);
+			return 0;
 		}
 
 	} while (++count < WM831X_GET_TIME_RETRIES);