Input: pxspad - switch to DEFINE_SIMPLE_DEV_PM_OPS() and pm_sleep_ptr()

SIMPLE_DEV_PM_OPS() is deprecated as it requires explicit protection
against used 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/20221204180841.2211588-2-jic23@kernel.org
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>

drivers/input/joystick/psxpad-spi.c

@@ -371,7 +371,7 @@ static int psxpad_spi_probe(struct spi_device *spi)
 	return 0;
 }
 
-static int __maybe_unused psxpad_spi_suspend(struct device *dev)
+static int psxpad_spi_suspend(struct device *dev)
 {
 	struct spi_device *spi = to_spi_device(dev);
 	struct psxpad *pad = spi_get_drvdata(spi);
@@ -381,7 +381,7 @@ static int __maybe_unused psxpad_spi_suspend(struct device *dev)
 	return 0;
 }
 
-static SIMPLE_DEV_PM_OPS(psxpad_spi_pm, psxpad_spi_suspend, NULL);
+static DEFINE_SIMPLE_DEV_PM_OPS(psxpad_spi_pm, psxpad_spi_suspend, NULL);
 
 static const struct spi_device_id psxpad_spi_id[] = {
 	{ "psxpad-spi", 0 },
@@ -392,7 +392,7 @@ MODULE_DEVICE_TABLE(spi, psxpad_spi_id);
 static struct spi_driver psxpad_spi_driver = {
 	.driver = {
 		.name = "psxpad-spi",
-		.pm = &psxpad_spi_pm,
+		.pm = pm_sleep_ptr(&psxpad_spi_pm),
 	},
 	.id_table = psxpad_spi_id,
 	.probe   = psxpad_spi_probe,