usb: gadget: m66592-udc: let udc-core manage gadget->dev

By simply setting a flag, we can drop some
boilerplate code.
Signed-off-by: Felipe Balbi <balbi@ti.com>

drivers/usb/gadget/m66592-udc.c

@@ -1538,7 +1538,6 @@ static int __exit m66592_remove(struct platform_device *pdev)
 	struct m66592		*m66592 = dev_get_drvdata(&pdev->dev);
 
 	usb_del_gadget_udc(&m66592->gadget);
-	device_del(&m66592->gadget.dev);
 
 	del_timer_sync(&m66592->timer);
 	iounmap(m66592->reg);
@@ -1608,13 +1607,12 @@ static int __init m66592_probe(struct platform_device *pdev)
 	dev_set_drvdata(&pdev->dev, m66592);
 
 	m66592->gadget.ops = &m66592_gadget_ops;
-	device_initialize(&m66592->gadget.dev);
-	dev_set_name(&m66592->gadget.dev, "gadget");
 	m66592->gadget.max_speed = USB_SPEED_HIGH;
 	m66592->gadget.dev.parent = &pdev->dev;
 	m66592->gadget.dev.dma_mask = pdev->dev.dma_mask;
 	m66592->gadget.dev.release = pdev->dev.release;
 	m66592->gadget.name = udc_name;
+	m66592->gadget.register_my_device = true;
 
 	init_timer(&m66592->timer);
 	m66592->timer.function = m66592_timer;
@@ -1674,12 +1672,6 @@ static int __init m66592_probe(struct platform_device *pdev)
 
 	init_controller(m66592);
 
-	ret = device_add(&m66592->gadget.dev);
-	if (ret) {
-		pr_err("device_add error (%d)\n", ret);
-		goto err_device_add;
-	}
-
 	ret = usb_add_gadget_udc(&pdev->dev, &m66592->gadget);
 	if (ret)
 		goto err_add_udc;
@@ -1688,9 +1680,6 @@ static int __init m66592_probe(struct platform_device *pdev)
 	return 0;
 
 err_add_udc:
-	device_del(&m66592->gadget.dev);
-
-err_device_add:
 	m66592_free_request(&m66592->ep[0].ep, m66592->ep0_req);
 
 clean_up3: