rtc: ds1390: mark OF related data as maybe unused

The driver can be compile tested with !CONFIG_OF making certain data
unused:

  drivers/rtc/rtc-ds1390.c:216:34: error: ‘ds1390_of_match’ defined but not used [-Werror=unused-const-variable=]

Signed-off-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
Link: https://lore.kernel.org/r/20230311111226.250922-1-krzysztof.kozlowski@linaro.org
Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com>

diff --git a/drivers/rtc/rtc-ds1390.c b/drivers/rtc/rtc-ds1390.c
index 93ce72b9ae59e3fca919398db024fae038de3c06..f46428ca77cc42cf56e002d4807410a66364c04e 100644 (file)
--- a/drivers/rtc/rtc-ds1390.c
+++ b/drivers/rtc/rtc-ds1390.c
@@ -213,7 +213,7 @@ static int ds1390_probe(struct spi_device *spi)
        return res;
 }
 
-static const struct of_device_id ds1390_of_match[] = {
+static const struct of_device_id ds1390_of_match[] __maybe_unused = {
        { .compatible = "dallas,ds1390" },
        {}
 };