net: ethernet: mtk_eth_soc: convert scratch_ring pointer to void

Simplify the code converting scratch_ring pointer to void
Signed-off-by: NLorenzo Bianconi <lorenzo@kernel.org>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

drivers/net/ethernet/mediatek/mtk_eth_soc.c

@@ -893,7 +893,7 @@ static int mtk_init_fq_dma(struct mtk_eth *eth)
 	for (i = 0; i < cnt; i++) {
 		struct mtk_tx_dma_v2 *txd;
 
-		txd = (void *)eth->scratch_ring + i * soc->txrx.txd_size;
+		txd = eth->scratch_ring + i * soc->txrx.txd_size;
 		txd->txd1 = dma_addr + i * MTK_QDMA_PAGE_SIZE;
 		if (i < cnt - 1)
 			txd->txd2 = eth->phy_scratch_ring +

drivers/net/ethernet/mediatek/mtk_eth_soc.h

@@ -1033,7 +1033,7 @@ struct mtk_eth {
 	struct mtk_rx_ring		rx_ring_qdma;
 	struct napi_struct		tx_napi;
 	struct napi_struct		rx_napi;
-	struct mtk_tx_dma		*scratch_ring;
+	void				*scratch_ring;
 	dma_addr_t			phy_scratch_ring;
 	void				*scratch_head;
 	struct clk			*clks[MTK_CLK_MAX];