dmaengine: rcar-dmac: Remove dummy Runtime PM callback

Since commit 63d00be ("PM: runtime: Allow unassigned
->runtime_suspend|resume callbacks"), unassigned
.runtime_{suspend,resume}() callbacks are treated the same as dummy
callbacks that just return zero.

Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>
Signed-off-by: Vinod Koul <vkoul@kernel.org>

Author: geertu

drivers/dma/sh/rcar-dmac.c

@@ -1729,11 +1729,6 @@ static struct dma_chan *rcar_dmac_of_xlate(struct of_phandle_args *dma_spec,
  */
 
 #ifdef CONFIG_PM
-static int rcar_dmac_runtime_suspend(struct device *dev)
-{
-	return 0;
-}
-
 static int rcar_dmac_runtime_resume(struct device *dev)
 {
 	struct rcar_dmac *dmac = dev_get_drvdata(dev);
@@ -1750,8 +1745,7 @@ static const struct dev_pm_ops rcar_dmac_pm = {
 	 */
 	SET_NOIRQ_SYSTEM_SLEEP_PM_OPS(pm_runtime_force_suspend,
 				      pm_runtime_force_resume)
-	SET_RUNTIME_PM_OPS(rcar_dmac_runtime_suspend, rcar_dmac_runtime_resume,
-			   NULL)
+	SET_RUNTIME_PM_OPS(NULL, rcar_dmac_runtime_resume, NULL)
 };
 
 /* -----------------------------------------------------------------------------