drm: rcar-du: lvds: Convert to RUNTIME_PM_OPS()

Convert the Renesas R-Car Display Unit LVDS driver from
SET_RUNTIME_PM_OPS() to RUNTIME_PM_OPS(), and pm_ptr().  This reduces
kernel size in case CONFIG_PM is disabled.  While DRM_RCAR_LVDS depends
on PM, the code may still serve as an example for new drivers.

Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>
Reviewed-by: Laurent Pinchart <laurent.pinchart+renesas@ideasonboard.com>
Link: https://lore.kernel.org/r/2264ff4f21a7e17384822e0efba176cf78ae184d.1756999823.git.geert+renesas@glider.be
Signed-off-by: Tomi Valkeinen <tomi.valkeinen@ideasonboard.com>

Author: geertu

drivers/gpu/drm/renesas/rcar-du/rcar_lvds.c

@@ -1013,15 +1013,15 @@ static int rcar_lvds_runtime_resume(struct device *dev)
 }
 
 static const struct dev_pm_ops rcar_lvds_pm_ops = {
-	SET_RUNTIME_PM_OPS(rcar_lvds_runtime_suspend, rcar_lvds_runtime_resume, NULL)
+	RUNTIME_PM_OPS(rcar_lvds_runtime_suspend, rcar_lvds_runtime_resume, NULL)
 };
 
 static struct platform_driver rcar_lvds_platform_driver = {
 	.probe		= rcar_lvds_probe,
 	.remove		= rcar_lvds_remove,
 	.driver		= {
 		.name	= "rcar-lvds",
-		.pm	= &rcar_lvds_pm_ops,
+		.pm	= pm_ptr(&rcar_lvds_pm_ops),
 		.of_match_table = rcar_lvds_of_table,
 	},
 };