media: usb: dvb-usb-v2: af9035: report if i2c client isn't bound

If a sub device doesn't immediately bind after it was added, emit an
error indication to the kernel log to help debugging. This happens for
example if the needed driver isn't available at all.
Signed-off-by: Uwe Kleine-König <uwe@kleine-koenig.org>
Signed-off-by: Sean Young <sean@mess.org>
Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>

drivers/media/usb/dvb-usb-v2/af9035.c

@@ -210,6 +210,7 @@ static int af9035_add_i2c_dev(struct dvb_usb_device *d, const char *type,
 	/* register I2C device */
 	client = i2c_new_client_device(adapter, &board_info);
 	if (!i2c_client_has_driver(client)) {
+		dev_err(&intf->dev, "failed to bind i2c device to %s driver\n", type);
 		ret = -ENODEV;
 		goto err;
 	}