Input: pm8941-pwrkey - 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: Stephen Boyd <swboyd@chromium.org>
Reviewed-by: Stephen Boyd <swboyd@chromium.org>
Reviewed-by: Linus Walleij <linus.walleij@linaro.org>
Link: https://lore.kernel.org/r/20230102181842.718010-17-jic23@kernel.orgSigned-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>

drivers/input/misc/pm8941-pwrkey.c

@@ -217,7 +217,7 @@ static int pm8941_pwrkey_sw_debounce_init(struct pm8941_pwrkey *pwrkey)
 	return 0;
 }
 
-static int __maybe_unused pm8941_pwrkey_suspend(struct device *dev)
+static int pm8941_pwrkey_suspend(struct device *dev)
 {
 	struct pm8941_pwrkey *pwrkey = dev_get_drvdata(dev);
 
@@ -227,7 +227,7 @@ static int __maybe_unused pm8941_pwrkey_suspend(struct device *dev)
 	return 0;
 }
 
-static int __maybe_unused pm8941_pwrkey_resume(struct device *dev)
+static int pm8941_pwrkey_resume(struct device *dev)
 {
 	struct pm8941_pwrkey *pwrkey = dev_get_drvdata(dev);
 
@@ -237,8 +237,8 @@ static int __maybe_unused pm8941_pwrkey_resume(struct device *dev)
 	return 0;
 }
 
-static SIMPLE_DEV_PM_OPS(pm8941_pwr_key_pm_ops,
-			 pm8941_pwrkey_suspend, pm8941_pwrkey_resume);
+static DEFINE_SIMPLE_DEV_PM_OPS(pm8941_pwr_key_pm_ops,
+				pm8941_pwrkey_suspend, pm8941_pwrkey_resume);
 
 static int pm8941_pwrkey_probe(struct platform_device *pdev)
 {
@@ -460,7 +460,7 @@ static struct platform_driver pm8941_pwrkey_driver = {
 	.remove = pm8941_pwrkey_remove,
 	.driver = {
 		.name = "pm8941-pwrkey",
-		.pm = &pm8941_pwr_key_pm_ops,
+		.pm = pm_sleep_ptr(&pm8941_pwr_key_pm_ops),
 		.of_match_table = of_match_ptr(pm8941_pwr_key_id_table),
 	},
 };