[PATCH] regulator: rt4801: Fix W=1 build warning when CONFIG_OF=n

[cy_huang]

From: ChiYuan Huang <cy_huang@xxxxxxxxxxx>

Fix below warning when CONFIG_OF=n:

drivers/regulator/rt4801-regulator.c:206:34: warning: unused variable 'rt4801_of_id' [-Wunused-const-variable]
  206 | static const struct of_device_id rt4801_of_id[] = {
      |                                  ^~~~~~~~~~~~

Signed-off-by: ChiYuan Huang <cy_huang@xxxxxxxxxxx>
Reported-by: kernel test robot <lkp@xxxxxxxxx>
---
 drivers/regulator/rt4801-regulator.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/regulator/rt4801-regulator.c b/drivers/regulator/rt4801-regulator.c
index 0ddc670..2055a9c 100644
--- a/drivers/regulator/rt4801-regulator.c
+++ b/drivers/regulator/rt4801-regulator.c
@@ -203,7 +203,7 @@ static int rt4801_probe(struct i2c_client *i2c)
 	return 0;
 }
 
-static const struct of_device_id rt4801_of_id[] = {
+static const struct of_device_id __maybe_unused rt4801_of_id[] = {
 	{ .compatible = "richtek,rt4801", },
 	{ },
 };
-- 
2.7.4