wifi: mt76: mt792x: fix ethtool warning

[ Upstream commit 7b4f9cd ]

Add a missing EHT related field to fix the following ethtool warning:
[98179.287352] mt7921e 0003:01:00.0: ei: 74  SSTATS_LEN: 73

Fixes: c74df1c ("wifi: mt76: mt792x: introduce mt792x-lib module")
Signed-off-by: Gen Xu <[email protected]>
Signed-off-by: Felix Fietkau <[email protected]>
Signed-off-by: Sasha Levin <[email protected]>

Author: gen-xu

drivers/net/wireless/mediatek/mt76/mt792x_core.c

@@ -332,6 +332,7 @@ static const char mt792x_gstrings_stats[][ETH_GSTRING_LEN] = {
 	"v_tx_bw_40",
 	"v_tx_bw_80",
 	"v_tx_bw_160",
+	"v_tx_bw_320",
 	"v_tx_mcs_0",
 	"v_tx_mcs_1",
 	"v_tx_mcs_2",