hwmon: (gpio-fan) 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 messy #ifdef barriers whilst
achieving the same result.
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
Cc: Linus Walleij <linus.walleij@linaro.org>
Link: https://lore.kernel.org/r/20220925172759.3573439-6-jic23@kernel.org
[groeck: Drop #ifdef from struct gpio_fan_data]
Signed-off-by: Guenter Roeck <linux@roeck-us.net>

drivers/hwmon/gpio-fan.c

@@ -37,9 +37,7 @@ struct gpio_fan_data {
 	int			num_speed;
 	struct gpio_fan_speed	*speed;
 	int			speed_index;
-#ifdef CONFIG_PM_SLEEP
 	int			resume_speed;
-#endif
 	bool			pwm_enable;
 	struct gpio_desc	*alarm_gpio;
 	struct work_struct	alarm_work;
@@ -557,7 +555,6 @@ static void gpio_fan_shutdown(struct platform_device *pdev)
 		set_fan_speed(fan_data, 0);
 }
 
-#ifdef CONFIG_PM_SLEEP
 static int gpio_fan_suspend(struct device *dev)
 {
 	struct gpio_fan_data *fan_data = dev_get_drvdata(dev);
@@ -580,18 +577,14 @@ static int gpio_fan_resume(struct device *dev)
 	return 0;
 }
 
-static SIMPLE_DEV_PM_OPS(gpio_fan_pm, gpio_fan_suspend, gpio_fan_resume);
-#define GPIO_FAN_PM	(&gpio_fan_pm)
-#else
-#define GPIO_FAN_PM	NULL
-#endif
+static DEFINE_SIMPLE_DEV_PM_OPS(gpio_fan_pm, gpio_fan_suspend, gpio_fan_resume);
 
 static struct platform_driver gpio_fan_driver = {
 	.probe		= gpio_fan_probe,
 	.shutdown	= gpio_fan_shutdown,
 	.driver	= {
 		.name	= "gpio-fan",
-		.pm	= GPIO_FAN_PM,
+		.pm	= pm_sleep_ptr(&gpio_fan_pm),
 		.of_match_table = of_match_ptr(of_gpio_fan_match),
 	},
 };