Input: tm2-touchkey - 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/20221204180841.2211588-13-jic23@kernel.org
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>

Author: jic23

drivers/input/keyboard/tm2-touchkey.c

@@ -297,7 +297,7 @@ static int tm2_touchkey_probe(struct i2c_client *client)
 	return 0;
 }
 
-static int __maybe_unused tm2_touchkey_suspend(struct device *dev)
+static int tm2_touchkey_suspend(struct device *dev)
 {
 	struct i2c_client *client = to_i2c_client(dev);
 	struct tm2_touchkey_data *touchkey = i2c_get_clientdata(client);
@@ -308,7 +308,7 @@ static int __maybe_unused tm2_touchkey_suspend(struct device *dev)
 	return 0;
 }
 
-static int __maybe_unused tm2_touchkey_resume(struct device *dev)
+static int tm2_touchkey_resume(struct device *dev)
 {
 	struct i2c_client *client = to_i2c_client(dev);
 	struct tm2_touchkey_data *touchkey = i2c_get_clientdata(client);
@@ -323,8 +323,8 @@ static int __maybe_unused tm2_touchkey_resume(struct device *dev)
 	return ret;
 }
 
-static SIMPLE_DEV_PM_OPS(tm2_touchkey_pm_ops,
-			 tm2_touchkey_suspend, tm2_touchkey_resume);
+static DEFINE_SIMPLE_DEV_PM_OPS(tm2_touchkey_pm_ops,
+				tm2_touchkey_suspend, tm2_touchkey_resume);
 
 static const struct i2c_device_id tm2_touchkey_id_table[] = {
 	{ TM2_TOUCHKEY_DEV_NAME, 0 },
@@ -353,7 +353,7 @@ MODULE_DEVICE_TABLE(of, tm2_touchkey_of_match);
 static struct i2c_driver tm2_touchkey_driver = {
 	.driver = {
 		.name = TM2_TOUCHKEY_DEV_NAME,
-		.pm = &tm2_touchkey_pm_ops,
+		.pm = pm_sleep_ptr(&tm2_touchkey_pm_ops),
 		.of_match_table = of_match_ptr(tm2_touchkey_of_match),
 	},
 	.probe_new = tm2_touchkey_probe,