rtc: ds1347: set range

The DS1347 handle dates from year 0000 to 9999. Leap years are claimed to
be handled correctly in the datasheet.

Link: https://lore.kernel.org/r/20191007134724.15505-7-alexandre.belloni@bootlin.comSigned-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com>

drivers/rtc/rtc-ds1347.c

@@ -134,6 +134,8 @@ static int ds1347_probe(struct spi_device *spi)
 		return PTR_ERR(rtc);
 
 	rtc->ops = &ds1347_rtc_ops;
+	rtc->range_min = RTC_TIMESTAMP_BEGIN_0000;
+	rtc->range_max = RTC_TIMESTAMP_END_9999;
 
 	return rtc_register_device(rtc);
 }