Input: spear-keyboard - 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/20221204180841.2211588-12-jic23@kernel.org
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>

Author: jic23

drivers/input/keyboard/spear-keyboard.c

@@ -284,7 +284,7 @@ static int spear_kbd_remove(struct platform_device *pdev)
 	return 0;
 }
 
-static int __maybe_unused spear_kbd_suspend(struct device *dev)
+static int spear_kbd_suspend(struct device *dev)
 {
 	struct platform_device *pdev = to_platform_device(dev);
 	struct spear_kbd *kbd = platform_get_drvdata(pdev);
@@ -337,7 +337,7 @@ static int __maybe_unused spear_kbd_suspend(struct device *dev)
 	return 0;
 }
 
-static int __maybe_unused spear_kbd_resume(struct device *dev)
+static int spear_kbd_resume(struct device *dev)
 {
 	struct platform_device *pdev = to_platform_device(dev);
 	struct spear_kbd *kbd = platform_get_drvdata(pdev);
@@ -364,7 +364,8 @@ static int __maybe_unused spear_kbd_resume(struct device *dev)
 	return 0;
 }
 
-static SIMPLE_DEV_PM_OPS(spear_kbd_pm_ops, spear_kbd_suspend, spear_kbd_resume);
+static DEFINE_SIMPLE_DEV_PM_OPS(spear_kbd_pm_ops,
+				spear_kbd_suspend, spear_kbd_resume);
 
 #ifdef CONFIG_OF
 static const struct of_device_id spear_kbd_id_table[] = {
@@ -379,7 +380,7 @@ static struct platform_driver spear_kbd_driver = {
 	.remove		= spear_kbd_remove,
 	.driver		= {
 		.name	= "keyboard",
-		.pm	= &spear_kbd_pm_ops,
+		.pm	= pm_sleep_ptr(&spear_kbd_pm_ops),
 		.of_match_table = of_match_ptr(spear_kbd_id_table),
 	},
 };