rtc: pcf85063: return an error when date is invalid

Return an error when the date is invalid as the policy should be
implemented there.
Signed-off-by: Alexandre Belloni <alexandre.belloni@free-electrons.com>

drivers/rtc/rtc-pcf85063.c

@@ -80,13 +80,7 @@ static int pcf85063_get_datetime(struct i2c_client *client, struct rtc_time *tm)
 	pcf85063->c_polarity = (buf[PCF85063_REG_MO] & PCF85063_MO_C) ?
 		(tm->tm_year >= 100) : (tm->tm_year < 100);
 
-	/* the clock can give out invalid datetime, but we cannot return
-	 * -EINVAL otherwise hwclock will refuse to set the time on bootup.
-	 */
-	if (rtc_valid_tm(tm) < 0)
-		dev_err(&client->dev, "retrieved date/time is not valid.\n");
-
-	return 0;
+	return rtc_valid_tm(tm);
 }
 
 static int pcf85063_set_datetime(struct i2c_client *client, struct rtc_time *tm)