drm: rcar-du: lvds: Use dev_err_probe()

Simplify error handling by using the dev_err_probe() function.
Signed-off-by: Laurent Pinchart <laurent.pinchart+renesas@ideasonboard.com>
Reviewed-by: Kieran Bingham <kieran.bingham+renesas@ideasonboard.com>

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

@@ -743,8 +743,7 @@ static struct clk *rcar_lvds_get_clock(struct rcar_lvds *lvds, const char *name,
 	if (PTR_ERR(clk) == -ENOENT && optional)
 		return NULL;
 
-	if (PTR_ERR(clk) != -EPROBE_DEFER)
-		dev_err(lvds->dev, "failed to get %s clock\n",
+	dev_err_probe(lvds->dev, PTR_ERR(clk), "failed to get %s clock\n",
 		      name ? name : "module");
 
 	return clk;