[][kernel][mt7988][eth][Revert Enhance the TX performance of the QDMA]

[Description]
Rollback Enhance the TX performance of the QDMA.

Because this patch could affect the performance of WiFi TBTC.

[Release-log]
N/A


Change-Id: I3cc39c3278cae2b3040c1d522273617f51da1ee1
Reviewed-on: https://gerrit.mediatek.inc/c/openwrt/feeds/mtk_openwrt_feeds/+/9014638
diff --git a/21.02/files/target/linux/mediatek/files-5.4/drivers/net/ethernet/mediatek/mtk_eth_soc.c b/21.02/files/target/linux/mediatek/files-5.4/drivers/net/ethernet/mediatek/mtk_eth_soc.c
index 9e64a13..f922f51 100644
--- a/21.02/files/target/linux/mediatek/files-5.4/drivers/net/ethernet/mediatek/mtk_eth_soc.c
+++ b/21.02/files/target/linux/mediatek/files-5.4/drivers/net/ethernet/mediatek/mtk_eth_soc.c
@@ -3868,19 +3868,11 @@
 
 	if (MTK_HAS_CAPS(eth->soc->caps, MTK_QDMA)) {
 		val = mtk_r32(eth, reg_map->qdma.glo_cfg);
-		if (MTK_HAS_CAPS(eth->soc->caps, MTK_NETSYS_V3)) {
+		if (MTK_HAS_CAPS(eth->soc->caps, MTK_NETSYS_V2) ||
+		    MTK_HAS_CAPS(eth->soc->caps, MTK_NETSYS_V3)) {
 			val &= ~(MTK_RESV_BUF_MASK | MTK_DMA_SIZE_MASK);
 			mtk_w32(eth,
 				val | MTK_TX_DMA_EN | MTK_RX_DMA_EN |
-				MTK_DMA_SIZE_16DWORDS | MTK_TX_WB_DDONE |
-				MTK_NDP_CO_PRO | MTK_MUTLI_CNT |
-				MTK_RESV_BUF | MTK_WCOMP_EN |
-				MTK_DMAD_WR_WDONE | MTK_CHK_DDONE_EN |
-				MTK_RX_2B_OFFSET, reg_map->qdma.glo_cfg);
-		} else if (MTK_HAS_CAPS(eth->soc->caps, MTK_NETSYS_V2)) {
-			val &= ~MTK_RESV_BUF_MASK;
-			mtk_w32(eth,
-				val | MTK_TX_DMA_EN | MTK_RX_DMA_EN |
 				MTK_DMA_SIZE_32DWORDS | MTK_TX_WB_DDONE |
 				MTK_NDP_CO_PRO | MTK_MUTLI_CNT |
 				MTK_RESV_BUF | MTK_WCOMP_EN |