rtc: stmp3xxx: set range

From the datasheet: "HW_RTC_SECONDS provides access to the 32-bit real-time
seconds counter."
Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com>

drivers/rtc/rtc-stmp3xxx.c

@@ -361,8 +361,7 @@ static int stmp3xxx_rtc_probe(struct platform_device *pdev)
 			STMP3XXX_RTC_CTRL_ALARM_IRQ_EN,
 		rtc_data->io + STMP3XXX_RTC_CTRL + STMP_OFFSET_REG_CLR);
 
-	rtc_data->rtc = devm_rtc_device_register(&pdev->dev, pdev->name,
-				&stmp3xxx_rtc_ops, THIS_MODULE);
+	rtc_data->rtc = devm_rtc_allocate_device(&pdev->dev);
 	if (IS_ERR(rtc_data->rtc))
 		return PTR_ERR(rtc_data->rtc);
 
@@ -374,6 +373,13 @@ static int stmp3xxx_rtc_probe(struct platform_device *pdev)
 		return err;
 	}
 
+	rtc_data->rtc->ops = &stmp3xxx_rtc_ops;
+	rtc_data->rtc->range_max = U32_MAX;
+
+	err = rtc_register_device(rtc_data->rtc);
+	if (err)
+		return err;
+
 	stmp3xxx_wdt_register(pdev);
 	return 0;
 }