[PATCH 2/4] iio: dac: ad5755: mark OF related data as maybe unused

[Krzysztof Kozlowski]

The driver can be compile tested with !CONFIG_OF making certain data
unused (of_device_id is not used for device matching):

  drivers/iio/dac/ad5755.c:865:34: error: ‘ad5755_of_match’ defined but not used [-Werror=unused-const-variable=]

Signed-off-by: Krzysztof Kozlowski <krzysztof.kozlowski@xxxxxxxxxx>
---
 drivers/iio/dac/ad5755.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/iio/dac/ad5755.c b/drivers/iio/dac/ad5755.c
index beadfa938d2d..a6dc8a0bfc29 100644
--- a/drivers/iio/dac/ad5755.c
+++ b/drivers/iio/dac/ad5755.c
@@ -862,7 +862,7 @@ static const struct spi_device_id ad5755_id[] = {
 };
 MODULE_DEVICE_TABLE(spi, ad5755_id);
 
-static const struct of_device_id ad5755_of_match[] = {
+static const struct of_device_id ad5755_of_match[] __maybe_unused = {
 	{ .compatible = "adi,ad5755" },
 	{ .compatible = "adi,ad5755-1" },
 	{ .compatible = "adi,ad5757" },
-- 
2.34.1