mt76: mt7615: fix sparse warnings: warning: cast from restricted __le16

Do not convert {tx,rx}_mcs_map to little-endian since it is already done
by mac80211. This patch fix the following sparse warning:

drivers/net/wireless/mediatek/mt76/mt7615/mcu.c:1497:25: sparse:
warning: cast from restricted __le16
drivers/net/wireless/mediatek/mt76/mt7615/mcu.c:1499:25: sparse:
warning: cast from restricted __le16

Fixes: 04b8e65 ("mt76: add mac80211 driver for MT7615 PCIe-based chipsets")
Fixes: 3ca0a6f6e9df ("mt7615: mcu: use standard signature for mt7615_mcu_msg_send")
Signed-off-by: Lorenzo Bianconi <lorenzo@kernel.org>
Signed-off-by: Felix Fietkau <nbd@nbd.name>

drivers/net/wireless/mediatek/mt76/mt7615/mcu.c

@@ -1393,10 +1393,8 @@ int mt7615_mcu_set_ht_cap(struct mt7615_dev *dev, struct ieee80211_vif *vif,
 		sta_vht->tag = cpu_to_le16(STA_REC_VHT);
 		sta_vht->len = cpu_to_le16(sizeof(*sta_vht));
 		sta_vht->vht_cap = cpu_to_le32(sta->vht_cap.cap);
-		sta_vht->vht_rx_mcs_map =
-			cpu_to_le16(sta->vht_cap.vht_mcs.rx_mcs_map);
-		sta_vht->vht_tx_mcs_map =
-			cpu_to_le16(sta->vht_cap.vht_mcs.tx_mcs_map);
+		sta_vht->vht_rx_mcs_map = sta->vht_cap.vht_mcs.rx_mcs_map;
+		sta_vht->vht_tx_mcs_map = sta->vht_cap.vht_mcs.tx_mcs_map;
 	}
 
 	ret = __mt76_mcu_send_msg(&dev->mt76, MCU_EXT_CMD_STA_REC_UPDATE,