rtc: digicolor: quiet maybe-unused variable warning

When CONFIG_OF is disabled then the matching table is not referenced.
Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com>
Acked-by: Baruch Siach <baruch@tkos.co.il>
Link: https://lore.kernel.org/r/20210202112219.3610853-6-alexandre.belloni@bootlin.com

drivers/rtc/rtc-digicolor.c

@@ -205,7 +205,7 @@ static int __init dc_rtc_probe(struct platform_device *pdev)
 	return devm_rtc_register_device(rtc->rtc_dev);
 }
 
-static const struct of_device_id dc_dt_ids[] = {
+static const __maybe_unused struct of_device_id dc_dt_ids[] = {
 	{ .compatible = "cnxt,cx92755-rtc" },
 	{ /* sentinel */ }
 };