ACPI: Use struct dev_pm_ops for power management in the power driver

Make the ACPI power resource driver define its PM callbacks through
a struct dev_pm_ops object rather than by using legacy PM hooks
in struct acpi_device_ops.
Signed-off-by: NRafael J. Wysocki <rjw@sisk.pl>

drivers/acpi/power.c

@@ -60,7 +60,6 @@ ACPI_MODULE_NAME("power");
 
 static int acpi_power_add(struct acpi_device *device);
 static int acpi_power_remove(struct acpi_device *device, int type);
-static int acpi_power_resume(struct acpi_device *device);
 
 static const struct acpi_device_id power_device_ids[] = {
 	{ACPI_POWER_HID, 0},
@@ -68,6 +67,9 @@ static const struct acpi_device_id power_device_ids[] = {
 };
 MODULE_DEVICE_TABLE(acpi, power_device_ids);
 
+static int acpi_power_resume(struct device *dev);
+static SIMPLE_DEV_PM_OPS(acpi_power_pm, NULL, acpi_power_resume);
+
 static struct acpi_driver acpi_power_driver = {
 	.name = "power",
 	.class = ACPI_POWER_CLASS,
@@ -75,8 +77,8 @@ static struct acpi_driver acpi_power_driver = {
 	.ops = {
 		.add = acpi_power_add,
 		.remove = acpi_power_remove,
-		.resume = acpi_power_resume,
 		},
+	.drv.pm = &acpi_power_pm,
 };
 
 /*
@@ -771,14 +773,16 @@ static int acpi_power_remove(struct acpi_device *device, int type)
 	return 0;
 }
 
-static int acpi_power_resume(struct acpi_device *device)
+static int acpi_power_resume(struct device *dev)
 {
 	int result = 0, state;
+	struct acpi_device *device;
 	struct acpi_power_resource *resource;
 
-	if (!device)
+	if (!dev)
 		return -EINVAL;
 
+	device = to_acpi_device(dev);
 	resource = acpi_driver_data(device);
 	if (!resource)
 		return -EINVAL;