Input: surface3_spi - 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: Stephen Just <stephenjust@gmail.com>
Cc: Benjamin Tissoires <benjamin.tissoires@redhat.com>
Reviewed-by: Linus Walleij <linus.walleij@linaro.org>
Link: https://lore.kernel.org/r/20230102181842.718010-62-jic23@kernel.orgSigned-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>

drivers/input/touchscreen/surface3_spi.c

@@ -369,7 +369,7 @@ static int surface3_spi_probe(struct spi_device *spi)
 	return 0;
 }
 
-static int __maybe_unused surface3_spi_suspend(struct device *dev)
+static int surface3_spi_suspend(struct device *dev)
 {
 	struct spi_device *spi = to_spi_device(dev);
 	struct surface3_ts_data *data = spi_get_drvdata(spi);
@@ -381,7 +381,7 @@ static int __maybe_unused surface3_spi_suspend(struct device *dev)
 	return 0;
 }
 
-static int __maybe_unused surface3_spi_resume(struct device *dev)
+static int surface3_spi_resume(struct device *dev)
 {
 	struct spi_device *spi = to_spi_device(dev);
 	struct surface3_ts_data *data = spi_get_drvdata(spi);
@@ -393,9 +393,9 @@ static int __maybe_unused surface3_spi_resume(struct device *dev)
 	return 0;
 }
 
-static SIMPLE_DEV_PM_OPS(surface3_spi_pm_ops,
-			 surface3_spi_suspend,
-			 surface3_spi_resume);
+static DEFINE_SIMPLE_DEV_PM_OPS(surface3_spi_pm_ops,
+				surface3_spi_suspend,
+				surface3_spi_resume);
 
 #ifdef CONFIG_ACPI
 static const struct acpi_device_id surface3_spi_acpi_match[] = {
@@ -409,7 +409,7 @@ static struct spi_driver surface3_spi_driver = {
 	.driver = {
 		.name	= "Surface3-spi",
 		.acpi_match_table = ACPI_PTR(surface3_spi_acpi_match),
-		.pm = &surface3_spi_pm_ops,
+		.pm = pm_sleep_ptr(&surface3_spi_pm_ops),
 	},
 	.probe = surface3_spi_probe,
 };