Input: mouse - 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/mouse/cyapa.c b/drivers/input/mouse/cyapa.c
index b409c3d..1d978c7 100644
--- a/drivers/input/mouse/cyapa.c
+++ b/drivers/input/mouse/cyapa.c
@@ -905,8 +905,7 @@
 	return 0;
 }
 
-#ifdef CONFIG_PM_SLEEP
-static int cyapa_suspend(struct device *dev)
+static int __maybe_unused cyapa_suspend(struct device *dev)
 {
 	int ret;
 	u8 power_mode;
@@ -929,7 +928,7 @@
 	return 0;
 }
 
-static int cyapa_resume(struct device *dev)
+static int __maybe_unused cyapa_resume(struct device *dev)
 {
 	int ret;
 	struct cyapa *cyapa = dev_get_drvdata(dev);
@@ -944,7 +943,6 @@
 	enable_irq(cyapa->irq);
 	return 0;
 }
-#endif /* CONFIG_PM_SLEEP */
 
 static SIMPLE_DEV_PM_OPS(cyapa_pm_ops, cyapa_suspend, cyapa_resume);