rtc: meson: 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: Kevin Hilman <khilman@baylibre.com>
Link: https://lore.kernel.org/r/20210202112219.3610853-11-alexandre.belloni@bootlin.com

drivers/rtc/rtc-meson.c

@@ -380,7 +380,7 @@ static int meson_rtc_probe(struct platform_device *pdev)
 	return ret;
 }
 
-static const struct of_device_id meson_rtc_dt_match[] = {
+static const __maybe_unused struct of_device_id meson_rtc_dt_match[] = {
 	{ .compatible = "amlogic,meson6-rtc", },
 	{ .compatible = "amlogic,meson8-rtc", },
 	{ .compatible = "amlogic,meson8b-rtc", },