phy: exynos-dp-video: Use PTR_ERR_OR_ZERO

PTR_ERR_OR_ZERO simplifies the code.
Signed-off-by: Sachin Kamat <sachin.kamat@linaro.org>
Cc: Jingoo Han <jg1.han@samsung.com>
Acked-by: Hans de Goede <hdegoede@redhat.com>
Signed-off-by: Kishon Vijay Abraham I <kishon@ti.com>

drivers/phy/phy-exynos-dp-video.c

@@ -9,6 +9,7 @@
  * published by the Free Software Foundation.
  */
 
+#include <linux/err.h>
 #include <linux/io.h>
 #include <linux/kernel.h>
 #include <linux/module.h>
@@ -84,10 +85,8 @@ static int exynos_dp_video_phy_probe(struct platform_device *pdev)
 	phy_set_drvdata(phy, state);
 
 	phy_provider = devm_of_phy_provider_register(dev, of_phy_simple_xlate);
-	if (IS_ERR(phy_provider))
-		return PTR_ERR(phy_provider);
 
-	return 0;
+	return PTR_ERR_OR_ZERO(phy_provider);
 }
 
 static const struct of_device_id exynos_dp_video_phy_of_match[] = {