Input: palmas-pwrbutton - 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>
Cc: Geert Uytterhoeven <geert+renesas@glider.be>
Reviewed-by: Linus Walleij <linus.walleij@linaro.org>
Link: https://lore.kernel.org/r/20230102181842.718010-15-jic23@kernel.orgSigned-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>

drivers/input/misc/palmas-pwrbutton.c

@@ -266,7 +266,7 @@ static int palmas_pwron_remove(struct platform_device *pdev)
  *
  * Return: 0
  */
-static int __maybe_unused palmas_pwron_suspend(struct device *dev)
+static int palmas_pwron_suspend(struct device *dev)
 {
 	struct platform_device *pdev = to_platform_device(dev);
 	struct palmas_pwron *pwron = platform_get_drvdata(pdev);
@@ -287,7 +287,7 @@ static int __maybe_unused palmas_pwron_suspend(struct device *dev)
  *
  * Return: 0
  */
-static int __maybe_unused palmas_pwron_resume(struct device *dev)
+static int palmas_pwron_resume(struct device *dev)
 {
 	struct platform_device *pdev = to_platform_device(dev);
 	struct palmas_pwron *pwron = platform_get_drvdata(pdev);
@@ -298,8 +298,8 @@ static int __maybe_unused palmas_pwron_resume(struct device *dev)
 	return 0;
 }
 
-static SIMPLE_DEV_PM_OPS(palmas_pwron_pm,
-			 palmas_pwron_suspend, palmas_pwron_resume);
+static DEFINE_SIMPLE_DEV_PM_OPS(palmas_pwron_pm,
+				palmas_pwron_suspend, palmas_pwron_resume);
 
 #ifdef CONFIG_OF
 static const struct of_device_id of_palmas_pwr_match[] = {
@@ -316,7 +316,7 @@ static struct platform_driver palmas_pwron_driver = {
 	.driver	= {
 		.name	= "palmas_pwrbutton",
 		.of_match_table = of_match_ptr(of_palmas_pwr_match),
-		.pm	= &palmas_pwron_pm,
+		.pm	= pm_sleep_ptr(&palmas_pwron_pm),
 	},
 };
 module_platform_driver(palmas_pwron_driver);