[][kernel][mt7981][eth][mediatek-ge: Change TX amplitude from 89% to 100% on MT7981 now]

[Description]
Change TX amplitude from 89% to 100% on MT7981 now.

[Release-log]
N/A

Change-Id: I4bdda03c2663956719d03129f0a88bc4f7418169
Reviewed-on: https://gerrit.mediatek.inc/c/openwrt/feeds/mtk_openwrt_feeds/+/7465654
diff --git a/target/linux/mediatek/files-5.4/drivers/net/phy/mediatek-ge.c b/target/linux/mediatek/files-5.4/drivers/net/phy/mediatek-ge.c
index b99ee0b..7a1233a 100644
--- a/target/linux/mediatek/files-5.4/drivers/net/phy/mediatek-ge.c
+++ b/target/linux/mediatek/files-5.4/drivers/net/phy/mediatek-ge.c
@@ -510,17 +510,6 @@
 		 * GBE: +7, TBT: +1, HBT: +4, TST: +7
 		 */
 		memcpy(bias, (const void *)vals_9461, sizeof(bias));
-		for (i = 0; i <= 12; i += 4) {
-			if (likely(buf[i >> 2] + bias[i] >= 32)) {
-				bias[i] -= 13;
-			} else {
-				phy_modify_mmd(phydev, MDIO_MMD_VEND1,
-					       0x5c, 0x7 << i, bias[i] << i);
-				bias[i + 1] += 13;
-				bias[i + 2] += 13;
-				bias[i + 3] += 13;
-			}
-		}
 		break;
 	case MTK_GPHY_ID_MT7988:
 		memcpy(bias, (const void *)vals_9481, sizeof(bias));