drm: vboxvideo: Remove #ifdef guards for PM related functions

Use the pm_sleep_ptr() macro to handle the .suspend / .resume callbacks.

This macro allows the suspend and resume functions to be automatically
dropped by the compiler when CONFIG_SUSPEND is disabled, without having
to use #ifdef guards.

This has the advantage of always compiling these functions in,
independently of any Kconfig option. Thanks to that, bugs and other
regressions are subsequently easier to catch.
Signed-off-by: Paul Cercueil <paul@crapouillou.net>
Reviewed-by: Hans de Goede <hdegoede@redhat.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20221129191942.138244-9-paul@crapouillou.net

drivers/gpu/drm/vboxvideo/vbox_drv.c

@@ -102,7 +102,6 @@ static void vbox_pci_remove(struct pci_dev *pdev)
 	vbox_hw_fini(vbox);
 }
 
-#ifdef CONFIG_PM_SLEEP
 static int vbox_pm_suspend(struct device *dev)
 {
 	struct vbox_private *vbox = dev_get_drvdata(dev);
@@ -160,16 +159,13 @@ static const struct dev_pm_ops vbox_pm_ops = {
 	.poweroff = vbox_pm_poweroff,
 	.restore = vbox_pm_resume,
 };
-#endif
 
 static struct pci_driver vbox_pci_driver = {
 	.name = DRIVER_NAME,
 	.id_table = pciidlist,
 	.probe = vbox_pci_probe,
 	.remove = vbox_pci_remove,
-#ifdef CONFIG_PM_SLEEP
-	.driver.pm = &vbox_pm_ops,
-#endif
+	.driver.pm = pm_sleep_ptr(&vbox_pm_ops),
 };
 
 DEFINE_DRM_GEM_FOPS(vbox_fops);