hwmon: (lm90) Switch to DEFINE_SIMPLE_DEV_PM_OPS() and pm_sleep_ptr()

These newer PM macros allow the compiler to see what code it can remove
if !CONFIG_PM_SLEEP. This allows the removal of __maybe_unused markings
whilst achieving the same result.
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
Cc: Guenter Roeck <linux@roeck-us.net>
Link: https://lore.kernel.org/r/20220925172759.3573439-8-jic23@kernel.orgSigned-off-by: Guenter Roeck <linux@roeck-us.net>

drivers/hwmon/lm90.c

@@ -2956,7 +2956,7 @@ static void lm90_alert(struct i2c_client *client, enum i2c_alert_protocol type,
 	}
 }
 
-static int __maybe_unused lm90_suspend(struct device *dev)
+static int lm90_suspend(struct device *dev)
 {
 	struct lm90_data *data = dev_get_drvdata(dev);
 	struct i2c_client *client = data->client;
@@ -2967,7 +2967,7 @@ static int __maybe_unused lm90_suspend(struct device *dev)
 	return 0;
 }
 
-static int __maybe_unused lm90_resume(struct device *dev)
+static int lm90_resume(struct device *dev)
 {
 	struct lm90_data *data = dev_get_drvdata(dev);
 	struct i2c_client *client = data->client;
@@ -2978,14 +2978,14 @@ static int __maybe_unused lm90_resume(struct device *dev)
 	return 0;
 }
 
-static SIMPLE_DEV_PM_OPS(lm90_pm_ops, lm90_suspend, lm90_resume);
+static DEFINE_SIMPLE_DEV_PM_OPS(lm90_pm_ops, lm90_suspend, lm90_resume);
 
 static struct i2c_driver lm90_driver = {
 	.class		= I2C_CLASS_HWMON,
 	.driver = {
 		.name	= "lm90",
 		.of_match_table = of_match_ptr(lm90_of_match),
-		.pm	= &lm90_pm_ops,
+		.pm	= pm_sleep_ptr(&lm90_pm_ops),
 	},
 	.probe_new	= lm90_probe,
 	.alert		= lm90_alert,