[media] au0828: only create V4L2 graph if V4L2 is registered

It doesn't make sense to try to create the analog TV graph,
if the device fails to register at V4L2, or if it doesn't have
V4L2 support.

Thanks to Shuah for pointing this issue.
Reported-by: Shuah Khan <shuahkh@osg.samsung.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@osg.samsung.com>

drivers/media/usb/au0828/au0828-core.c

@@ -419,8 +419,21 @@ static int au0828_usb_probe(struct usb_interface *interface,
 
 #ifdef CONFIG_VIDEO_AU0828_V4L2
 	/* Analog TV */
-	if (AUVI_INPUT(0).type != AU0828_VMUX_UNDEFINED)
-		au0828_analog_register(dev, interface);
+	if (AUVI_INPUT(0).type != AU0828_VMUX_UNDEFINED) {
+		retval = au0828_analog_register(dev, interface);
+		if (retval) {
+			pr_err("%s() au0282_dev_register failed to register on V4L2\n",
+			       __func__);
+			goto done;
+		}
+
+		retval = au0828_create_media_graph(dev);
+		if (retval) {
+			pr_err("%s() au0282_dev_register failed to create graph\n",
+			       __func__);
+			goto done;
+		}
+	}
 #endif
 
 	/* Digital TV */
@@ -443,13 +456,6 @@ static int au0828_usb_probe(struct usb_interface *interface,
 
 	mutex_unlock(&dev->lock);
 
-	retval = au0828_create_media_graph(dev);
-	if (retval) {
-		pr_err("%s() au0282_dev_register failed to create graph\n",
-		       __func__);
-		goto done;
-	}
-
 #ifdef CONFIG_MEDIA_CONTROLLER
 	retval = media_device_register(dev->media_dev);
 #endif