power: bq24190_charger: mark PM functions as __maybe_unused

Without CONFIG_PM, we get a harmless warning:

drivers/power/supply/bq24190_charger.c:1514:12: error: 'bq24190_runtime_resume' defined but not used [-Werror=unused-function]
drivers/power/supply/bq24190_charger.c:1501:12: error: 'bq24190_runtime_suspend' defined but not used [-Werror=unused-function]

To avoid the warning, we can mark all four PM functions as __maybe_unused,
which also lets us remove the incorrect #ifdef.

Fixes: 3d8090cba638 ("power: bq24190_charger: Check the interrupt status on resume")
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Acked-by: Tony Lindgren <tony@atomide.com>
Acked-by: Liam Breck <kernel@networkimprov.net>
Signed-off-by: Sebastian Reichel <sre@kernel.org>

drivers/power/supply/bq24190_charger.c

@@ -1498,7 +1498,7 @@ static int bq24190_remove(struct i2c_client *client)
 	return 0;
 }
 
-static int bq24190_runtime_suspend(struct device *dev)
+static __maybe_unused int bq24190_runtime_suspend(struct device *dev)
 {
 	struct i2c_client *client = to_i2c_client(dev);
 	struct bq24190_dev_info *bdi = i2c_get_clientdata(client);
@@ -1511,7 +1511,7 @@ static int bq24190_runtime_suspend(struct device *dev)
 	return 0;
 }
 
-static int bq24190_runtime_resume(struct device *dev)
+static __maybe_unused int bq24190_runtime_resume(struct device *dev)
 {
 	struct i2c_client *client = to_i2c_client(dev);
 	struct bq24190_dev_info *bdi = i2c_get_clientdata(client);
@@ -1527,8 +1527,7 @@ static int bq24190_runtime_resume(struct device *dev)
 	return 0;
 }
 
-#ifdef CONFIG_PM_SLEEP
-static int bq24190_pm_suspend(struct device *dev)
+static __maybe_unused int bq24190_pm_suspend(struct device *dev)
 {
 	struct i2c_client *client = to_i2c_client(dev);
 	struct bq24190_dev_info *bdi = i2c_get_clientdata(client);
@@ -1550,7 +1549,7 @@ static int bq24190_pm_suspend(struct device *dev)
 	return 0;
 }
 
-static int bq24190_pm_resume(struct device *dev)
+static __maybe_unused int bq24190_pm_resume(struct device *dev)
 {
 	struct i2c_client *client = to_i2c_client(dev);
 	struct bq24190_dev_info *bdi = i2c_get_clientdata(client);
@@ -1580,7 +1579,6 @@ static int bq24190_pm_resume(struct device *dev)
 
 	return 0;
 }
-#endif
 
 static const struct dev_pm_ops bq24190_pm_ops = {
 	SET_RUNTIME_PM_OPS(bq24190_runtime_suspend, bq24190_runtime_resume,