Input: ar1021 - 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>
Reviewed-by: Linus Walleij <linus.walleij@linaro.org>
Link: https://lore.kernel.org/r/20230102181842.718010-33-jic23@kernel.org
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>

drivers/input/touchscreen/ar1021_i2c.c

@@ -142,7 +142,7 @@ static int ar1021_i2c_probe(struct i2c_client *client)
 	return 0;
 }
 
-static int __maybe_unused ar1021_i2c_suspend(struct device *dev)
+static int ar1021_i2c_suspend(struct device *dev)
 {
 	struct i2c_client *client = to_i2c_client(dev);
 
@@ -151,7 +151,7 @@ static int __maybe_unused ar1021_i2c_suspend(struct device *dev)
 	return 0;
 }
 
-static int __maybe_unused ar1021_i2c_resume(struct device *dev)
+static int ar1021_i2c_resume(struct device *dev)
 {
 	struct i2c_client *client = to_i2c_client(dev);
 
@@ -160,7 +160,8 @@ static int __maybe_unused ar1021_i2c_resume(struct device *dev)
 	return 0;
 }
 
-static SIMPLE_DEV_PM_OPS(ar1021_i2c_pm, ar1021_i2c_suspend, ar1021_i2c_resume);
+static DEFINE_SIMPLE_DEV_PM_OPS(ar1021_i2c_pm,
+				ar1021_i2c_suspend, ar1021_i2c_resume);
 
 static const struct i2c_device_id ar1021_i2c_id[] = {
 	{ "ar1021", 0 },
@@ -177,7 +178,7 @@ MODULE_DEVICE_TABLE(of, ar1021_i2c_of_match);
 static struct i2c_driver ar1021_i2c_driver = {
 	.driver	= {
 		.name	= "ar1021_i2c",
-		.pm	= &ar1021_i2c_pm,
+		.pm	= pm_sleep_ptr(&ar1021_i2c_pm),
 		.of_match_table = ar1021_i2c_of_match,
 	},