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 <[e-mail]>
Cc: René van Dorst <[e-mail]>
Cc: Daniel Golle <[e-mail]>
Cc: Sean Wang <[e-mail]>
Cc: John Crispin <[e-mail]>
Signed-off-by: David S. Miller <[e-mail]>

drivers/net/ethernet/mediatek/mtk_eth_soc.c

···
 
 	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;
···
 		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

···
 				 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