rtc: ep93xx: set range

The ep93xx RTC is a 32-bit seconds counter.
Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com>

drivers/rtc/rtc-ep93xx.c

@@ -143,6 +143,7 @@ static int ep93xx_rtc_probe(struct platform_device *pdev)
 		return PTR_ERR(ep93xx_rtc->rtc);
 
 	ep93xx_rtc->rtc->ops = &ep93xx_rtc_ops;
+	ep93xx_rtc->rtc->range_max = U32_MAX;
 
 	err = rtc_add_group(ep93xx_rtc->rtc, &ep93xx_rtc_sysfs_files);
 	if (err)