media: aspeed: Fix return value check in aspeed_video_debugfs_create()

In case of error, the function debugfs_create_file() returns ERR_PTR()
and never returns NULL. The NULL test in the return value check
should be replaced with IS_ERR().

Fixes: 52fed10 ("media: aspeed: add debugfs")
Signed-off-by: Zheng Yongjun <zhengyongjun3@huawei.com>

drivers/media/platform/aspeed/aspeed-video.c

@@ -1780,10 +1780,12 @@ static int aspeed_video_debugfs_create(struct aspeed_video *video)
 	debugfs_entry = debugfs_create_file(DEVICE_NAME, 0444, NULL,
 					    video,
 					    &aspeed_video_debugfs_ops);
-	if (!debugfs_entry)
+	if (IS_ERR(debugfs_entry)) {
 		aspeed_video_debugfs_remove(video);
+		return ERR_PTR(debugfs_entry);
+	}
 
-	return !debugfs_entry ? -EIO : 0;
+	return 0;
 }
 #else
 static void aspeed_video_debugfs_remove(struct aspeed_video *video) { }