net: ethernet: mediatek: Rename NEXT_RX_DESP_IDX to NEXT_DESP_IDX

Rename the NEXT_RX_DESP_IDX macro to NEXT_DESP_IDX, so that it better
can be used for TX ops as well. This will be used in the upcoming
MT7628/88 support (same functionality for RX and TX in this macro).
Signed-off-by: Stefan Roese <sr@denx.de>
Cc: René van Dorst <opensource@vdorst.com>
Cc: Daniel Golle <daniel@makrotopia.org>
Cc: Sean Wang <sean.wang@mediatek.com>
Cc: John Crispin <john@phrozen.org>
Signed-off-by: David S. Miller <davem@davemloft.net>

drivers/net/ethernet/mediatek/mtk_eth_soc.c

@@ -903,7 +903,7 @@ static struct mtk_rx_ring *mtk_get_rx_ring(struct mtk_eth *eth)
 
 	for (i = 0; i < MTK_MAX_RX_RING_NUM; i++) {
 		ring = &eth->rx_ring[i];
-		idx = NEXT_RX_DESP_IDX(ring->calc_idx, ring->dma_size);
+		idx = NEXT_DESP_IDX(ring->calc_idx, ring->dma_size);
 		if (ring->dma[idx].rxd2 & RX_DMA_DONE) {
 			ring->calc_idx_update = true;
 			return ring;
@@ -952,7 +952,7 @@ static int mtk_poll_rx(struct napi_struct *napi, int budget,
 		if (unlikely(!ring))
 			goto rx_done;
 
-		idx = NEXT_RX_DESP_IDX(ring->calc_idx, ring->dma_size);
+		idx = NEXT_DESP_IDX(ring->calc_idx, ring->dma_size);
 		rxd = &ring->dma[idx];
 		data = ring->data[idx];
 

drivers/net/ethernet/mediatek/mtk_eth_soc.h

@@ -39,7 +39,7 @@
 				 NETIF_F_SG | NETIF_F_TSO | \
 				 NETIF_F_TSO6 | \
 				 NETIF_F_IPV6_CSUM)
-#define NEXT_RX_DESP_IDX(X, Y)	(((X) + 1) & ((Y) - 1))
+#define NEXT_DESP_IDX(X, Y)	(((X) + 1) & ((Y) - 1))
 
 #define MTK_MAX_RX_RING_NUM	4
 #define MTK_HW_LRO_DMA_SIZE	8