Input: wm97xx - 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/20230102181842.718010-67-jic23@kernel.orgSigned-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>

drivers/input/touchscreen/wm97xx-core.c

@@ -763,7 +763,7 @@ static int wm97xx_mfd_remove(struct platform_device *pdev)
 	return 0;
 }
 
-static int __maybe_unused wm97xx_suspend(struct device *dev)
+static int wm97xx_suspend(struct device *dev)
 {
 	struct wm97xx *wm = dev_get_drvdata(dev);
 	u16 reg;
@@ -797,7 +797,7 @@ static int __maybe_unused wm97xx_suspend(struct device *dev)
 	return 0;
 }
 
-static int __maybe_unused wm97xx_resume(struct device *dev)
+static int wm97xx_resume(struct device *dev)
 {
 	struct wm97xx *wm = dev_get_drvdata(dev);
 
@@ -833,7 +833,7 @@ static int __maybe_unused wm97xx_resume(struct device *dev)
 	return 0;
 }
 
-static SIMPLE_DEV_PM_OPS(wm97xx_pm_ops, wm97xx_suspend, wm97xx_resume);
+static DEFINE_SIMPLE_DEV_PM_OPS(wm97xx_pm_ops, wm97xx_suspend, wm97xx_resume);
 
 /*
  * Machine specific operations
@@ -869,13 +869,13 @@ static struct device_driver wm97xx_driver = {
 	.owner =	THIS_MODULE,
 	.probe =	wm97xx_probe,
 	.remove =	wm97xx_remove,
-	.pm =		&wm97xx_pm_ops,
+	.pm =		pm_sleep_ptr(&wm97xx_pm_ops),
 };
 
 static struct platform_driver wm97xx_mfd_driver = {
 	.driver = {
 		.name =		"wm97xx-ts",
-		.pm =		&wm97xx_pm_ops,
+		.pm =		pm_sleep_ptr(&wm97xx_pm_ops),
 	},
 	.probe =	wm97xx_mfd_probe,
 	.remove =	wm97xx_mfd_remove,