Input: misc - use __maybe_unused instead of ifdef around suspend/resume

Use __maybe_unused instead of ifdef guards around suspend/resume
functions, in order to increase build coverage and fix build warnings.

Signed-off-by: Jingoo Han <jg1.han@samsung.com>
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
diff --git a/drivers/input/misc/88pm860x_onkey.c b/drivers/input/misc/88pm860x_onkey.c
index 220ce0f..3cbd1b3 100644
--- a/drivers/input/misc/88pm860x_onkey.c
+++ b/drivers/input/misc/88pm860x_onkey.c
@@ -112,8 +112,7 @@
 	return 0;
 }
 
-#ifdef CONFIG_PM_SLEEP
-static int pm860x_onkey_suspend(struct device *dev)
+static int __maybe_unused pm860x_onkey_suspend(struct device *dev)
 {
 	struct platform_device *pdev = to_platform_device(dev);
 	struct pm860x_chip *chip = dev_get_drvdata(pdev->dev.parent);
@@ -122,7 +121,7 @@
 		chip->wakeup_flag |= 1 << PM8607_IRQ_ONKEY;
 	return 0;
 }
-static int pm860x_onkey_resume(struct device *dev)
+static int __maybe_unused pm860x_onkey_resume(struct device *dev)
 {
 	struct platform_device *pdev = to_platform_device(dev);
 	struct pm860x_chip *chip = dev_get_drvdata(pdev->dev.parent);
@@ -131,7 +130,6 @@
 		chip->wakeup_flag &= ~(1 << PM8607_IRQ_ONKEY);
 	return 0;
 }
-#endif
 
 static SIMPLE_DEV_PM_OPS(pm860x_onkey_pm_ops, pm860x_onkey_suspend, pm860x_onkey_resume);