Input: pwm-beeper - 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: Lars-Peter Clausen <lars@metafoo.de>
Reviewed-by: Linus Walleij <linus.walleij@linaro.org>
Link: https://lore.kernel.org/r/20230102181842.718010-20-jic23@kernel.orgSigned-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>

drivers/input/misc/pwm-beeper.c

@@ -203,7 +203,7 @@ static int pwm_beeper_probe(struct platform_device *pdev)
 	return 0;
 }
 
-static int __maybe_unused pwm_beeper_suspend(struct device *dev)
+static int pwm_beeper_suspend(struct device *dev)
 {
 	struct pwm_beeper *beeper = dev_get_drvdata(dev);
 
@@ -221,7 +221,7 @@ static int __maybe_unused pwm_beeper_suspend(struct device *dev)
 	return 0;
 }
 
-static int __maybe_unused pwm_beeper_resume(struct device *dev)
+static int pwm_beeper_resume(struct device *dev)
 {
 	struct pwm_beeper *beeper = dev_get_drvdata(dev);
 
@@ -235,7 +235,7 @@ static int __maybe_unused pwm_beeper_resume(struct device *dev)
 	return 0;
 }
 
-static SIMPLE_DEV_PM_OPS(pwm_beeper_pm_ops,
+static DEFINE_SIMPLE_DEV_PM_OPS(pwm_beeper_pm_ops,
 				pwm_beeper_suspend, pwm_beeper_resume);
 
 #ifdef CONFIG_OF
@@ -250,7 +250,7 @@ static struct platform_driver pwm_beeper_driver = {
 	.probe	= pwm_beeper_probe,
 	.driver = {
 		.name	= "pwm-beeper",
-		.pm	= &pwm_beeper_pm_ops,
+		.pm	= pm_sleep_ptr(&pwm_beeper_pm_ops),
 		.of_match_table = of_match_ptr(pwm_beeper_match),
 	},
 };