drm/tidss: Make use of the helper macro SET_RUNTIME_PM_OPS()

Use the helper macro SET_RUNTIME_PM_OPS() instead of the verbose
operators ".runtime_suspend/.runtime_resume", because the
SET_RUNTIME_PM_OPS() is a nice helper macro that could be brought
in to make code a little more concise.
Signed-off-by: Cai Huoqing <caihuoqing@baidu.com>
Reviewed-by: Tomi Valkeinen <tomi.valkeinen@ideasonboard.com>
Signed-off-by: Tomi Valkeinen <tomi.valkeinen@ideasonboard.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20210907033526.1612-1-caihuoqing@baidu.com

drivers/gpu/drm/tidss/tidss_drv.c

@@ -88,16 +88,11 @@ static int __maybe_unused tidss_resume(struct device *dev)
 	return drm_mode_config_helper_resume(&tidss->ddev);
 }
 
-#ifdef CONFIG_PM
-
 static const struct dev_pm_ops tidss_pm_ops = {
-	.runtime_suspend = tidss_pm_runtime_suspend,
-	.runtime_resume = tidss_pm_runtime_resume,
 	SET_SYSTEM_SLEEP_PM_OPS(tidss_suspend, tidss_resume)
+	SET_RUNTIME_PM_OPS(tidss_pm_runtime_suspend, tidss_pm_runtime_resume, NULL)
 };
 
-#endif /* CONFIG_PM */
-
 /* DRM device Information */
 
 static void tidss_release(struct drm_device *ddev)
@@ -250,9 +245,7 @@ static struct platform_driver tidss_platform_driver = {
 	.shutdown	= tidss_shutdown,
 	.driver		= {
 		.name	= "tidss",
-#ifdef CONFIG_PM
-		.pm	= &tidss_pm_ops,
-#endif
+		.pm	= pm_ptr(&tidss_pm_ops),
 		.of_match_table = tidss_of_table,
 		.suppress_bind_attrs = true,
 	},