usb: dwc3: gadget: let udc-core manage gadget->dev

We don't need to register that device ourselves
if we simply set gadget->register_my_device.
Signed-off-by: NFelipe Balbi <balbi@ti.com>

drivers/usb/dwc3/gadget.c

@@ -2488,8 +2488,6 @@ int dwc3_gadget_init(struct dwc3 *dwc)
 		goto err3;
 	}
 
-	dev_set_name(&dwc->gadget.dev, "gadget");
-
 	dwc->gadget.ops			= &dwc3_gadget_ops;
 	dwc->gadget.max_speed		= USB_SPEED_SUPER;
 	dwc->gadget.speed		= USB_SPEED_UNKNOWN;
@@ -2501,6 +2499,7 @@ int dwc3_gadget_init(struct dwc3 *dwc)
 	dwc->gadget.dev.dma_parms	= dwc->dev->dma_parms;
 	dwc->gadget.dev.dma_mask	= dwc->dev->dma_mask;
 	dwc->gadget.dev.release		= dwc3_gadget_release;
+	dwc->gadget.register_my_device	= true;
 	dwc->gadget.name		= "dwc3-gadget";
 
 	/*
@@ -2544,24 +2543,14 @@ int dwc3_gadget_init(struct dwc3 *dwc)
 		dwc3_gadget_usb3_phy_suspend(dwc, false);
 	}
 
-	ret = device_register(&dwc->gadget.dev);
-	if (ret) {
-		dev_err(dwc->dev, "failed to register gadget device\n");
-		put_device(&dwc->gadget.dev);
-		goto err6;
-	}
-
 	ret = usb_add_gadget_udc(dwc->dev, &dwc->gadget);
 	if (ret) {
 		dev_err(dwc->dev, "failed to register udc\n");
-		goto err7;
+		goto err6;
 	}
 
 	return 0;
 
-err7:
-	device_unregister(&dwc->gadget.dev);
-
 err6:
 	dwc3_writel(dwc->regs, DWC3_DEVTEN, 0x00);
 	free_irq(irq, dwc);
@@ -2610,6 +2599,4 @@ void dwc3_gadget_exit(struct dwc3 *dwc)
 
 	dma_free_coherent(dwc->dev, sizeof(*dwc->ctrl_req),
 			dwc->ctrl_req, dwc->ctrl_req_addr);
-
-	device_unregister(&dwc->gadget.dev);
 }