net: fec: remove the unused functions

Removed those unused functions since we simplified the driver
by using the page pool to manage RX buffers.
Signed-off-by: Shenwei Wang <shenwei.wang@nxp.com>
Link: https://lore.kernel.org/r/20221017161236.1563975-1-shenwei.wang@nxp.comSigned-off-by: Jakub Kicinski <kuba@kernel.org>

drivers/net/ethernet/freescale/fec_main.c

@@ -365,16 +365,6 @@ static void swap_buffer(void *bufaddr, int len)
 		swab32s(buf);
 }
 
-static void swap_buffer2(void *dst_buf, void *src_buf, int len)
-{
-	int i;
-	unsigned int *src = src_buf;
-	unsigned int *dst = dst_buf;
-
-	for (i = 0; i < len; i += 4, src++, dst++)
-		*dst = swab32p(src);
-}
-
 static void fec_dump(struct net_device *ndev)
 {
 	struct fec_enet_private *fep = netdev_priv(ndev);
@@ -1494,53 +1484,6 @@ static void fec_enet_tx(struct net_device *ndev)
 		fec_enet_tx_queue(ndev, i);
 }
 
-static int __maybe_unused
-fec_enet_new_rxbdp(struct net_device *ndev, struct bufdesc *bdp, struct sk_buff *skb)
-{
-	struct  fec_enet_private *fep = netdev_priv(ndev);
-	int off;
-
-	off = ((unsigned long)skb->data) & fep->rx_align;
-	if (off)
-		skb_reserve(skb, fep->rx_align + 1 - off);
-
-	bdp->cbd_bufaddr = cpu_to_fec32(dma_map_single(&fep->pdev->dev, skb->data, FEC_ENET_RX_FRSIZE - fep->rx_align, DMA_FROM_DEVICE));
-	if (dma_mapping_error(&fep->pdev->dev, fec32_to_cpu(bdp->cbd_bufaddr))) {
-		if (net_ratelimit())
-			netdev_err(ndev, "Rx DMA memory map failed\n");
-		return -ENOMEM;
-	}
-
-	return 0;
-}
-
-static bool __maybe_unused
-fec_enet_copybreak(struct net_device *ndev, struct sk_buff **skb,
-		   struct bufdesc *bdp, u32 length, bool swap)
-{
-	struct  fec_enet_private *fep = netdev_priv(ndev);
-	struct sk_buff *new_skb;
-
-	if (length > fep->rx_copybreak)
-		return false;
-
-	new_skb = netdev_alloc_skb(ndev, length);
-	if (!new_skb)
-		return false;
-
-	dma_sync_single_for_cpu(&fep->pdev->dev,
-				fec32_to_cpu(bdp->cbd_bufaddr),
-				FEC_ENET_RX_FRSIZE - fep->rx_align,
-				DMA_FROM_DEVICE);
-	if (!swap)
-		memcpy(new_skb->data, (*skb)->data, length);
-	else
-		swap_buffer2(new_skb->data, (*skb)->data, length);
-	*skb = new_skb;
-
-	return true;
-}
-
 static void fec_enet_update_cbd(struct fec_enet_priv_rx_q *rxq,
 				struct bufdesc *bdp, int index)
 {