Input: wdt87xx_i2c - 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/20230102181842.718010-66-jic23@kernel.orgSigned-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>

drivers/input/touchscreen/wdt87xx_i2c.c

@@ -1113,7 +1113,7 @@ static int wdt87xx_ts_probe(struct i2c_client *client)
 	return 0;
 }
 
-static int __maybe_unused wdt87xx_suspend(struct device *dev)
+static int wdt87xx_suspend(struct device *dev)
 {
 	struct i2c_client *client = to_i2c_client(dev);
 	int error;
@@ -1132,7 +1132,7 @@ static int __maybe_unused wdt87xx_suspend(struct device *dev)
 	return 0;
 }
 
-static int __maybe_unused wdt87xx_resume(struct device *dev)
+static int wdt87xx_resume(struct device *dev)
 {
 	struct i2c_client *client = to_i2c_client(dev);
 	int error;
@@ -1154,7 +1154,7 @@ static int __maybe_unused wdt87xx_resume(struct device *dev)
 	return 0;
 }
 
-static SIMPLE_DEV_PM_OPS(wdt87xx_pm_ops, wdt87xx_suspend, wdt87xx_resume);
+static DEFINE_SIMPLE_DEV_PM_OPS(wdt87xx_pm_ops, wdt87xx_suspend, wdt87xx_resume);
 
 static const struct i2c_device_id wdt87xx_dev_id[] = {
 	{ WDT87XX_NAME, 0 },
@@ -1173,7 +1173,7 @@ static struct i2c_driver wdt87xx_driver = {
 	.id_table	= wdt87xx_dev_id,
 	.driver	= {
 		.name	= WDT87XX_NAME,
-		.pm     = &wdt87xx_pm_ops,
+		.pm     = pm_sleep_ptr(&wdt87xx_pm_ops),
 		.acpi_match_table = ACPI_PTR(wdt87xx_acpi_id),
 	},
 };