Input: ambakmi - 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/20230102181842.718010-30-jic23@kernel.orgSigned-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>

drivers/input/serio/ambakmi.c

@@ -170,7 +170,7 @@ static void amba_kmi_remove(struct amba_device *dev)
 	amba_release_regions(dev);
 }
 
-static int __maybe_unused amba_kmi_resume(struct device *dev)
+static int amba_kmi_resume(struct device *dev)
 {
 	struct amba_kmi_port *kmi = dev_get_drvdata(dev);
 
@@ -180,7 +180,7 @@ static int __maybe_unused amba_kmi_resume(struct device *dev)
 	return 0;
 }
 
-static SIMPLE_DEV_PM_OPS(amba_kmi_dev_pm_ops, NULL, amba_kmi_resume);
+static DEFINE_SIMPLE_DEV_PM_OPS(amba_kmi_dev_pm_ops, NULL, amba_kmi_resume);
 
 static const struct amba_id amba_kmi_idtable[] = {
 	{
@@ -196,7 +196,7 @@ static struct amba_driver ambakmi_driver = {
 	.drv		= {
 		.name	= "kmi-pl050",
 		.owner	= THIS_MODULE,
-		.pm	= &amba_kmi_dev_pm_ops,
+		.pm	= pm_sleep_ptr(&amba_kmi_dev_pm_ops),
 	},
 	.id_table	= amba_kmi_idtable,
 	.probe		= amba_kmi_probe,