iio:accel:mma9553: Switch from CONFIG_PM guards to pm_ptr() etc

Letting the compiler remove these functions when the kernel is built
without CONFIG_PM support is simpler and less error prone than the
use of #ifdef based config guards.

Removing instances of this approach from IIO also stops them being
copied into new drivers.
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
Reviewed-by: Paul Cercueil <paul@crapouillou.net>
Link: https://lore.kernel.org/r/20220130193147.279148-9-jic23@kernel.org

drivers/iio/accel/mma9553.c

@@ -1162,7 +1162,6 @@ static int mma9553_remove(struct i2c_client *client)
 	return 0;
 }
 
-#ifdef CONFIG_PM
 static int mma9553_runtime_suspend(struct device *dev)
 {
 	struct iio_dev *indio_dev = i2c_get_clientdata(to_i2c_client(dev));
@@ -1194,9 +1193,7 @@ static int mma9553_runtime_resume(struct device *dev)
 
 	return 0;
 }
-#endif
 
-#ifdef CONFIG_PM_SLEEP
 static int mma9553_suspend(struct device *dev)
 {
 	struct iio_dev *indio_dev = i2c_get_clientdata(to_i2c_client(dev));
@@ -1222,12 +1219,10 @@ static int mma9553_resume(struct device *dev)
 
 	return ret;
 }
-#endif
 
 static const struct dev_pm_ops mma9553_pm_ops = {
-	SET_SYSTEM_SLEEP_PM_OPS(mma9553_suspend, mma9553_resume)
-	SET_RUNTIME_PM_OPS(mma9553_runtime_suspend,
-			   mma9553_runtime_resume, NULL)
+	SYSTEM_SLEEP_PM_OPS(mma9553_suspend, mma9553_resume)
+	RUNTIME_PM_OPS(mma9553_runtime_suspend, mma9553_runtime_resume, NULL)
 };
 
 static const struct acpi_device_id mma9553_acpi_match[] = {
@@ -1248,7 +1243,7 @@ static struct i2c_driver mma9553_driver = {
 	.driver = {
 		   .name = MMA9553_DRV_NAME,
 		   .acpi_match_table = ACPI_PTR(mma9553_acpi_match),
-		   .pm = &mma9553_pm_ops,
+		   .pm = pm_ptr(&mma9553_pm_ops),
 		   },
 	.probe = mma9553_probe,
 	.remove = mma9553_remove,