Input: iqs5xx - 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>
Cc: Jeff LaBundy <jeff@labundy.com>
Reviewed-by: Jeff LaBundy <jeff@labundy.com>
Reviewed-by: Linus Walleij <linus.walleij@linaro.org>
Link: https://lore.kernel.org/r/20230102181842.718010-52-jic23@kernel.org
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>

drivers/input/touchscreen/iqs5xx.c

@@ -979,7 +979,7 @@ static const struct attribute_group iqs5xx_attr_group = {
 	.attrs = iqs5xx_attrs,
 };
 
-static int __maybe_unused iqs5xx_suspend(struct device *dev)
+static int iqs5xx_suspend(struct device *dev)
 {
 	struct iqs5xx_private *iqs5xx = dev_get_drvdata(dev);
 	struct input_dev *input = iqs5xx->input;
@@ -998,7 +998,7 @@ static int __maybe_unused iqs5xx_suspend(struct device *dev)
 	return error;
 }
 
-static int __maybe_unused iqs5xx_resume(struct device *dev)
+static int iqs5xx_resume(struct device *dev)
 {
 	struct iqs5xx_private *iqs5xx = dev_get_drvdata(dev);
 	struct input_dev *input = iqs5xx->input;
@@ -1017,7 +1017,7 @@ static int __maybe_unused iqs5xx_resume(struct device *dev)
 	return error;
 }
 
-static SIMPLE_DEV_PM_OPS(iqs5xx_pm, iqs5xx_suspend, iqs5xx_resume);
+static DEFINE_SIMPLE_DEV_PM_OPS(iqs5xx_pm, iqs5xx_suspend, iqs5xx_resume);
 
 static int iqs5xx_probe(struct i2c_client *client)
 {
@@ -1090,7 +1090,7 @@ static struct i2c_driver iqs5xx_i2c_driver = {
 	.driver = {
 		.name		= "iqs5xx",
 		.of_match_table	= iqs5xx_of_match,
-		.pm		= &iqs5xx_pm,
+		.pm		= pm_sleep_ptr(&iqs5xx_pm),
 	},
 	.id_table	= iqs5xx_id,
 	.probe_new	= iqs5xx_probe,