usb: gadget: udc: net2280: Remove function resume_dma

Function resume_dma is not used, remove it.

The reason the compiler did not catch this dead code is the inline
modifier.
Signed-off-by: Ricardo Ribalda Delgado <ricardo.ribalda@gmail.com>
Signed-off-by: Felipe Balbi <balbi@ti.com>

drivers/usb/gadget/udc/net2280.c

@@ -831,11 +831,6 @@ static void start_dma(struct net2280_ep *ep, struct net2280_request *req)
 	start_queue(ep, tmp, req->td_dma);
 }
 
-static inline void resume_dma(struct net2280_ep *ep)
-{
-	writel(readl(&ep->dma->dmactl) | BIT(DMA_ENABLE), &ep->dma->dmactl);
-}
-
 static inline void
 queue_dma(struct net2280_ep *ep, struct net2280_request *req, int valid)
 {