wifi: mt76: mt7996: fix TWT command format

Align the command format of UNI_CMD_TWT_ARGT_UPDATE to firmware.

Fixes: 98686cd2 ("wifi: mt76: mt7996: add driver for MediaTek Wi-Fi 7 (802.11be) devices")
Signed-off-by: Peter Chiu <chui-hao.chiu@mediatek.com>
Signed-off-by: Shayne Chen <shayne.chen@mediatek.com>
Signed-off-by: Felix Fietkau <nbd@nbd.name>

drivers/net/wireless/mediatek/mt76/mt7996/mcu.c

@@ -3548,7 +3548,9 @@ int mt7996_mcu_twt_agrt_update(struct mt7996_dev *dev,
 			       int cmd)
 {
 	struct {
-		u8 _rsv[4];
+		/* fixed field */
+		u8 bss;
+		u8 _rsv[3];
 
 		__le16 tag;
 		__le16 len;
@@ -3566,7 +3568,7 @@ int mt7996_mcu_twt_agrt_update(struct mt7996_dev *dev,
 		u8 exponent;
 		u8 is_ap;
 		u8 agrt_params;
-		u8 __rsv2[135];
+		u8 __rsv2[23];
 	} __packed req = {
 		.tag = cpu_to_le16(UNI_CMD_TWT_ARGT_UPDATE),
 		.len = cpu_to_le16(sizeof(req) - 4),
@@ -3576,6 +3578,7 @@ int mt7996_mcu_twt_agrt_update(struct mt7996_dev *dev,
 		.flowid = flow->id,
 		.peer_id = cpu_to_le16(flow->wcid),
 		.duration = flow->duration,
+		.bss = mvif->mt76.idx,
 		.bss_idx = mvif->mt76.idx,
 		.start_tsf = cpu_to_le64(flow->tsf),
 		.mantissa = flow->mantissa,