Input: stpmic1_onekey - 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 <[e-mail]>
Cc: Pascal Paillet <[e-mail]>
Reviewed-by: Linus Walleij <[e-mail]>
Link: https://lore.kernel.org/r/[e-mail]
Signed-off-by: Dmitry Torokhov <[e-mail]>

drivers/input/misc/stpmic1_onkey.c

···
 	return 0;
 }
 
-static int __maybe_unused stpmic1_onkey_suspend(struct device *dev)
+static int stpmic1_onkey_suspend(struct device *dev)
 {
 	struct platform_device *pdev = to_platform_device(dev);
 	struct stpmic1_onkey *onkey = platform_get_drvdata(pdev);
···
 	return 0;
 }
 
-static int __maybe_unused stpmic1_onkey_resume(struct device *dev)
+static int stpmic1_onkey_resume(struct device *dev)
 {
 	struct platform_device *pdev = to_platform_device(dev);
 	struct stpmic1_onkey *onkey = platform_get_drvdata(pdev);
···
 	return 0;
 }
 
-static SIMPLE_DEV_PM_OPS(stpmic1_onkey_pm,
-			 stpmic1_onkey_suspend,
-			 stpmic1_onkey_resume);
+static DEFINE_SIMPLE_DEV_PM_OPS(stpmic1_onkey_pm,
+				stpmic1_onkey_suspend,
+				stpmic1_onkey_resume);
 
 static const struct of_device_id of_stpmic1_onkey_match[] = {
 	{ .compatible = "st,stpmic1-onkey" },
···
 	.driver	= {
 		.name	= "stpmic1_onkey",
 		.of_match_table = of_match_ptr(of_stpmic1_onkey_match),
-		.pm	= &stpmic1_onkey_pm,
+		.pm	= pm_sleep_ptr(&stpmic1_onkey_pm),
 	},
 };
 module_platform_driver(stpmic1_onkey_driver);