wifi: mt76: mt7996: fix alignment of sta info event

Fix the alignment of struct mt7996_mcu_all_sta_info_event.

Fixes: adde3eed ("wifi: mt76: mt7996: Add mcu commands for getting sta tx statistic")
Signed-off-by: StanleyYP Wang <StanleyYP.Wang@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.h

@@ -203,7 +203,7 @@ struct mt7996_mcu_all_sta_info_event {
 	u8 more;
 	u8 rsv2;
 	__le16 sta_num;
-	u8 rsv3[2];
+	u8 rsv3[4];
 
 	union {
 		struct all_sta_trx_rate rate[0];