Input: 88pm860x - switch to DEFINE_SIMPLE_DEV_PM_OPS() and pm_sleep_ptr()

SIMPLE_DEV_PM_OPS() is deprecated as it requires explicit protection
against unused function warnings.  The new combination of pm_sleep_ptr()
and DEFINE_SIMPLE_DEV_PM_OPS() allows the compiler to see the functions,
thus suppressing the warning, but still allowing the unused code to be
removed. Thus also drop the __maybe_unused markings.
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
Reviewed-by: Linus Walleij <linus.walleij@linaro.org>
Link: https://lore.kernel.org/r/20230102181842.718010-2-jic23@kernel.orgSigned-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>

drivers/input/misc/88pm860x_onkey.c

@@ -110,7 +110,7 @@ static int pm860x_onkey_probe(struct platform_device *pdev)
 	return 0;
 }
 
-static int __maybe_unused pm860x_onkey_suspend(struct device *dev)
+static int pm860x_onkey_suspend(struct device *dev)
 {
 	struct platform_device *pdev = to_platform_device(dev);
 	struct pm860x_chip *chip = dev_get_drvdata(pdev->dev.parent);
@@ -119,7 +119,7 @@ static int __maybe_unused pm860x_onkey_suspend(struct device *dev)
 		chip->wakeup_flag |= 1 << PM8607_IRQ_ONKEY;
 	return 0;
 }
-static int __maybe_unused pm860x_onkey_resume(struct device *dev)
+static int pm860x_onkey_resume(struct device *dev)
 {
 	struct platform_device *pdev = to_platform_device(dev);
 	struct pm860x_chip *chip = dev_get_drvdata(pdev->dev.parent);
@@ -129,12 +129,13 @@ static int __maybe_unused pm860x_onkey_resume(struct device *dev)
 	return 0;
 }
 
-static SIMPLE_DEV_PM_OPS(pm860x_onkey_pm_ops, pm860x_onkey_suspend, pm860x_onkey_resume);
+static DEFINE_SIMPLE_DEV_PM_OPS(pm860x_onkey_pm_ops,
+				pm860x_onkey_suspend, pm860x_onkey_resume);
 
 static struct platform_driver pm860x_onkey_driver = {
 	.driver		= {
 		.name	= "88pm860x-onkey",
-		.pm	= &pm860x_onkey_pm_ops,
+		.pm	= pm_sleep_ptr(&pm860x_onkey_pm_ops),
 	},
 	.probe		= pm860x_onkey_probe,
 };