usb: gadget: udc: net2280: Merge abort_dma for 228x and 338x

We can use the same function for both families of chips and also remove
the ep_stop_dma() function.
Signed-off-by: Ricardo Ribalda Delgado <ricardo.ribalda@gmail.com>
Signed-off-by: Felipe Balbi <balbi@ti.com>

drivers/usb/gadget/udc/net2280.c

@@ -836,12 +836,6 @@ static inline void resume_dma(struct net2280_ep *ep)
 	writel(readl(&ep->dma->dmactl) | BIT(DMA_ENABLE), &ep->dma->dmactl);
 }
 
-static inline void ep_stop_dma(struct net2280_ep *ep)
-{
-	writel(readl(&ep->dma->dmactl) & ~BIT(DMA_ENABLE), &ep->dma->dmactl);
-	spin_stop_dma(ep->dma);
-}
-
 static inline void
 queue_dma(struct net2280_ep *ep, struct net2280_request *req, int valid)
 {
@@ -1115,7 +1109,7 @@ static void restart_dma(struct net2280_ep *ep)
 	start_dma(ep, req);
 }
 
-static void abort_dma_228x(struct net2280_ep *ep)
+static void abort_dma(struct net2280_ep *ep)
 {
 	/* abort the current transfer */
 	if (likely(!list_empty(&ep->queue))) {
@@ -1127,19 +1121,6 @@ static void abort_dma_228x(struct net2280_ep *ep)
 	scan_dma_completions(ep);
 }
 
-static void abort_dma_338x(struct net2280_ep *ep)
-{
-	writel(BIT(DMA_ABORT), &ep->dma->dmastat);
-	spin_stop_dma(ep->dma);
-}
-
-static void abort_dma(struct net2280_ep *ep)
-{
-	if (ep->dev->quirks & PLX_LEGACY)
-		return abort_dma_228x(ep);
-	return abort_dma_338x(ep);
-}
-
 /* dequeue ALL requests */
 static void nuke(struct net2280_ep *ep)
 {
@@ -2813,7 +2794,7 @@ static void handle_stat0_irqs_superspeed(struct net2280 *dev,
 				ep->dev->protocol_stall = 1;
 			else {
 				if (ep->dma)
-					ep_stop_dma(ep);
+					abort_dma(ep);
 				set_halt(ep);
 			}
 			allow_status_338x(ep);