Input: ipaq-micro-ts - use DEFINE_SIMPLE_DEV_PM_OPS() and pm_sleep_ptr()

This driver never used the older SIMPLE_DEV_PM_OPS() but instead just
set two of the callbacks directly.  Skip that deprecated macro and go
straight to the new form that avoids the need for guarding or marking
callbacks __maybe_unused.

--
It is possible there is some subtle reason why only two of the
callbacks normally set by SIMPLE_DEV_PM_OPS() are set. As such,
this one needs some closer reading than many of the others.
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
Cc: Linus Walleij <linus.walleij@linaro.org>
Reviewed-by: Linus Walleij <linus.walleij@linaro.org>
Link: https://lore.kernel.org/r/20230102181842.718010-70-jic23@kernel.orgSigned-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>

drivers/input/touchscreen/ipaq-micro-ts.c

@@ -119,7 +119,7 @@ static int micro_ts_probe(struct platform_device *pdev)
 	return 0;
 }
 
-static int __maybe_unused micro_ts_suspend(struct device *dev)
+static int micro_ts_suspend(struct device *dev)
 {
 	struct touchscreen_data *ts = dev_get_drvdata(dev);
 
@@ -128,7 +128,7 @@ static int __maybe_unused micro_ts_suspend(struct device *dev)
 	return 0;
 }
 
-static int __maybe_unused micro_ts_resume(struct device *dev)
+static int micro_ts_resume(struct device *dev)
 {
 	struct touchscreen_data *ts = dev_get_drvdata(dev);
 	struct input_dev *input = ts->input;
@@ -143,14 +143,13 @@ static int __maybe_unused micro_ts_resume(struct device *dev)
 	return 0;
 }
 
-static const struct dev_pm_ops micro_ts_dev_pm_ops = {
-	SET_SYSTEM_SLEEP_PM_OPS(micro_ts_suspend, micro_ts_resume)
-};
+static DEFINE_SIMPLE_DEV_PM(micro_ts_dev_pm_ops,
+			    micro_ts_suspend, micro_ts_resume);
 
 static struct platform_driver micro_ts_device_driver = {
 	.driver	= {
 		.name	= "ipaq-micro-ts",
-		.pm	= &micro_ts_dev_pm_ops,
+		.pm	= pm_sleep_ptr(&micro_ts_dev_pm_ops),
 	},
 	.probe	= micro_ts_probe,
 };