Input: ipaq-micro-keys - 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>
Acked-by: Linus Walleij <linus.walleij@linaro.org>
Link: https://lore.kernel.org/r/20221204180841.2211588-8-jic23@kernel.orgSigned-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>

drivers/input/keyboard/ipaq-micro-keys.c

@@ -124,7 +124,7 @@ static int micro_key_probe(struct platform_device *pdev)
 	return 0;
 }
 
-static int __maybe_unused micro_key_suspend(struct device *dev)
+static int micro_key_suspend(struct device *dev)
 {
 	struct ipaq_micro_keys *keys = dev_get_drvdata(dev);
 
@@ -133,7 +133,7 @@ static int __maybe_unused micro_key_suspend(struct device *dev)
 	return 0;
 }
 
-static int __maybe_unused micro_key_resume(struct device *dev)
+static int micro_key_resume(struct device *dev)
 {
 	struct ipaq_micro_keys *keys = dev_get_drvdata(dev);
 	struct input_dev *input = keys->input;
@@ -148,13 +148,13 @@ static int __maybe_unused micro_key_resume(struct device *dev)
 	return 0;
 }
 
-static SIMPLE_DEV_PM_OPS(micro_key_dev_pm_ops,
+static DEFINE_SIMPLE_DEV_PM_OPS(micro_key_dev_pm_ops,
 				micro_key_suspend, micro_key_resume);
 
 static struct platform_driver micro_key_device_driver = {
 	.driver = {
 		.name    = "ipaq-micro-keys",
-		.pm	= &micro_key_dev_pm_ops,
+		.pm	= pm_sleep_ptr(&micro_key_dev_pm_ops),
 	},
 	.probe   = micro_key_probe,
 };