agp/via: Update to DEFINE_SIMPLE_DEV_PM_OPS()

As of 1a3c7bb0 ("PM: core: Add new *_PM_OPS macros, deprecate old
ones"), SIMPLE_DEV_PM_OPS() is deprecated in favor of
DEFINE_SIMPLE_DEV_PM_OPS(), which has the advantage that the PM callbacks
don't need to be wrapped with #ifdef CONFIG_PM or tagged with
__maybe_unused.

Convert to DEFINE_SIMPLE_DEV_PM_OPS().  No functional change intended.

Link: https://lore.kernel.org/r/20221025203852.681822-9-helgaas@kernel.orgSigned-off-by: NBjorn Helgaas <bhelgaas@google.com>
Acked-by: NDave Airlie <airlied@redhat.com>

drivers/char/agp/via-agp.c

@@ -489,9 +489,7 @@ static void agp_via_remove(struct pci_dev *pdev)
 	agp_put_bridge(bridge);
 }
 
-#define agp_via_suspend NULL
-
-static int __maybe_unused agp_via_resume(struct device *dev)
+static int agp_via_resume(struct device *dev)
 {
 	struct agp_bridge_data *bridge = dev_get_drvdata(dev);
 
@@ -551,7 +549,7 @@ static const struct pci_device_id agp_via_pci_table[] = {
 
 MODULE_DEVICE_TABLE(pci, agp_via_pci_table);
 
-static SIMPLE_DEV_PM_OPS(agp_via_pm_ops, agp_via_suspend, agp_via_resume);
+static DEFINE_SIMPLE_DEV_PM_OPS(agp_via_pm_ops, NULL, agp_via_resume);
 
 static struct pci_driver agp_via_pci_driver = {
 	.name		= "agpgart-via",