usb: gadget: net22xx: fix ->disconnect reporting

with the latest udc_start/udc_stop conversion,
too much code was deleted which ended up creating
a regression in net2272 and net2280 drivers.

To fix the regression we revert one hunk of the
original commits.
Signed-off-by: NFelipe Balbi <balbi@ti.com>

drivers/usb/gadget/net2272.c

@@ -1495,6 +1495,13 @@ stop_activity(struct net2272 *dev, struct usb_gadget_driver *driver)
 	for (i = 0; i < 4; ++i)
 		net2272_dequeue_all(&dev->ep[i]);
 
+	/* report disconnect; the driver is already quiesced */
+	if (driver) {
+		spin_unlock(&dev->lock);
+		driver->disconnect(&dev->gadget);
+		spin_lock(&dev->lock);
+	}
+
 	net2272_usb_reinit(dev);
 }
 

drivers/usb/gadget/net2280.c

@@ -1946,6 +1946,13 @@ stop_activity (struct net2280 *dev, struct usb_gadget_driver *driver)
 	for (i = 0; i < 7; i++)
 		nuke (&dev->ep [i]);
 
+	/* report disconnect; the driver is already quiesced */
+	if (driver) {
+		spin_unlock(&dev->lock);
+		driver->disconnect(&dev->gadget);
+		spin_lock(&dev->lock);
+	}
+
 	usb_reinit (dev);
 }