Input: ep39xx-keypad - 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>
Link: https://lore.kernel.org/r/20221204180841.2211588-6-jic23@kernel.orgSigned-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>

drivers/input/keyboard/ep93xx_keypad.c

@@ -178,7 +178,7 @@ static void ep93xx_keypad_close(struct input_dev *pdev)
 }
 
 
-static int __maybe_unused ep93xx_keypad_suspend(struct device *dev)
+static int ep93xx_keypad_suspend(struct device *dev)
 {
 	struct platform_device *pdev = to_platform_device(dev);
 	struct ep93xx_keypad *keypad = platform_get_drvdata(pdev);
@@ -196,7 +196,7 @@ static int __maybe_unused ep93xx_keypad_suspend(struct device *dev)
 	return 0;
 }
 
-static int __maybe_unused ep93xx_keypad_resume(struct device *dev)
+static int ep93xx_keypad_resume(struct device *dev)
 {
 	struct platform_device *pdev = to_platform_device(dev);
 	struct ep93xx_keypad *keypad = platform_get_drvdata(pdev);
@@ -217,8 +217,8 @@ static int __maybe_unused ep93xx_keypad_resume(struct device *dev)
 	return 0;
 }
 
-static SIMPLE_DEV_PM_OPS(ep93xx_keypad_pm_ops,
-			 ep93xx_keypad_suspend, ep93xx_keypad_resume);
+static DEFINE_SIMPLE_DEV_PM_OPS(ep93xx_keypad_pm_ops,
+				ep93xx_keypad_suspend, ep93xx_keypad_resume);
 
 static void ep93xx_keypad_release_gpio_action(void *_pdev)
 {
@@ -318,7 +318,7 @@ static int ep93xx_keypad_remove(struct platform_device *pdev)
 static struct platform_driver ep93xx_keypad_driver = {
 	.driver		= {
 		.name	= "ep93xx-keypad",
-		.pm	= &ep93xx_keypad_pm_ops,
+		.pm	= pm_sleep_ptr(&ep93xx_keypad_pm_ops),
 	},
 	.probe		= ep93xx_keypad_probe,
 	.remove		= ep93xx_keypad_remove,