gpio: xra1403: remove redundant of_match_ptr()

The driver depends on CONFIG_OF, so it is not necessary to use
of_match_ptr() here, and __maybe_unused can also be removed.

Even for drivers that do not depend on CONFIG_OF, it's almost always
better to leave out the of_match_ptr(), since the only thing it can
possibly do is to save a few bytes of .text if a driver can be used both
with and without it.
Signed-off-by: Zhu Wang <wangzhu9@huawei.com>
Reviewed-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Signed-off-by: Bartosz Golaszewski <bartosz.golaszewski@linaro.org>

drivers/gpio/gpio-xra1403.c

@@ -194,7 +194,7 @@ static const struct spi_device_id xra1403_ids[] = {
 };
 MODULE_DEVICE_TABLE(spi, xra1403_ids);
 
-static const struct of_device_id xra1403_spi_of_match[] __maybe_unused = {
+static const struct of_device_id xra1403_spi_of_match[] = {
 	{ .compatible = "exar,xra1403" },
 	{},
 };
@@ -205,7 +205,7 @@ static struct spi_driver xra1403_driver = {
 	.id_table = xra1403_ids,
 	.driver   = {
 		.name           = "xra1403",
-		.of_match_table = of_match_ptr(xra1403_spi_of_match),
+		.of_match_table = xra1403_spi_of_match,
 	},
 };