media: nuvoton: npcm-video: Fix IS_ERR() vs NULL bug

The of_parse_phandle() function returns NULL on error.  It never returns
error pointers.  Update the check accordingly.

Fixes: 70721089985c ("media: nuvoton: Add driver for NPCM video capture and encoding engine")
Signed-off-by: Dan Carpenter <dan.carpenter@linaro.org>
Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>

drivers/media/platform/nuvoton/npcm-video.c

@@ -1660,9 +1660,9 @@ static int npcm_video_ece_init(struct npcm_video *video)
 	void __iomem *regs;
 
 	ece_node = of_parse_phandle(video->dev->of_node, "nuvoton,ece", 0);
-	if (IS_ERR(ece_node)) {
+	if (!ece_node) {
 		dev_err(dev, "Failed to get ECE phandle in DTS\n");
-		return PTR_ERR(ece_node);
+		return -ENODEV;
 	}
 
 	video->ece.enable = of_device_is_available(ece_node);