wifi: mt76: mt7915: fix reporting of TX AGGR histogram

Fix stats clash between bins [4-7] in 802.11 tx aggregation histogram.

Fixes: e57b790 ("mt76: add mac80211 driver for MT7915 PCIe-based chipsets")
Signed-off-by: Lorenzo Bianconi <lorenzo@kernel.org>
Signed-off-by: Felix Fietkau <nbd@nbd.name>

Author: LorenzoBianconi

drivers/net/wireless/mediatek/mt76/mt7915/mac.c

@@ -1641,7 +1641,7 @@ void mt7915_mac_update_stats(struct mt7915_phy *phy)
 
 	aggr0 = phy->band_idx ? ARRAY_SIZE(dev->mt76.aggr_stats) / 2 : 0;
 	if (is_mt7915(&dev->mt76)) {
-		for (i = 0, aggr1 = aggr0 + 4; i < 4; i++) {
+		for (i = 0, aggr1 = aggr0 + 8; i < 4; i++) {
 			val = mt76_rr(dev, MT_MIB_MB_SDR1(phy->band_idx, (i << 4)));
 			mib->ba_miss_cnt +=
 				FIELD_GET(MT_MIB_BA_MISS_COUNT_MASK, val);