mfd: aat2870: Remove #ifdef guards for PM related functions

Use the new DEFINE_SIMPLE_DEV_PM_OPS() and pm_sleep_ptr() macros
to handle the .suspend/.resume callbacks.

These macros allow the suspend and resume functions to be automatically
dropped by the compiler when CONFIG_SUSPEND is disabled, without having
to use #ifdef guards.

This has the advantage of always compiling these functions in,
independently of any Kconfig option. Thanks to that, bugs and other
regressions are subsequently easier to catch.
Signed-off-by: Paul Cercueil <paul@crapouillou.net>
Signed-off-by: Lee Jones <lee@kernel.org>

drivers/mfd/aat2870-core.c

@@ -408,7 +408,6 @@ static int aat2870_i2c_probe(struct i2c_client *client)
 	return ret;
 }
 
-#ifdef CONFIG_PM_SLEEP
 static int aat2870_i2c_suspend(struct device *dev)
 {
 	struct i2c_client *client = to_i2c_client(dev);
@@ -437,10 +436,9 @@ static int aat2870_i2c_resume(struct device *dev)
 
 	return 0;
 }
-#endif /* CONFIG_PM_SLEEP */
 
-static SIMPLE_DEV_PM_OPS(aat2870_pm_ops, aat2870_i2c_suspend,
-			 aat2870_i2c_resume);
+static DEFINE_SIMPLE_DEV_PM_OPS(aat2870_pm_ops, aat2870_i2c_suspend,
+				aat2870_i2c_resume);
 
 static const struct i2c_device_id aat2870_i2c_id_table[] = {
 	{ "aat2870", 0 },
@@ -450,7 +448,7 @@ static const struct i2c_device_id aat2870_i2c_id_table[] = {
 static struct i2c_driver aat2870_i2c_driver = {
 	.driver = {
 		.name			= "aat2870",
-		.pm			= &aat2870_pm_ops,
+		.pm			= pm_sleep_ptr(&aat2870_pm_ops),
 		.suppress_bind_attrs	= true,
 	},
 	.probe_new	= aat2870_i2c_probe,