[PATCH] USB: net2280 one-liner

Please merge this minor fix:

   - loosen constraints on buffer allocation

This is needed before Alan's file-backed storage
gadget driver will initialize using net2280.

drivers/usb/gadget/net2280.c

@@ -450,7 +450,7 @@ net2280_alloc_buffer (
 	struct net2280_ep	*ep;
 
 	ep = container_of (_ep, struct net2280_ep, ep);
-	if (!_ep || (!ep->desc && ep->num != 0))
+	if (!_ep)
 		return 0;
 
 	*dma = DMA_ADDR_INVALID;