rtc: snvs: set range

The SNVS is a 47-bit counter incremented at 32768Hz, it is then a 32-bit
second counter.

Link: https://lore.kernel.org/r/20190828205056.31321-1-alexandre.belloni@bootlin.comSigned-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com>

drivers/rtc/rtc-snvs.c

@@ -348,6 +348,7 @@ static int snvs_rtc_probe(struct platform_device *pdev)
 	}
 
 	data->rtc->ops = &snvs_rtc_ops;
+	data->rtc->range_max = U32_MAX;
 	ret = rtc_register_device(data->rtc);
 	if (ret) {
 		dev_err(&pdev->dev, "failed to register rtc: %d\n", ret);