ath10k: fill tx_duration for each peer in Tx stats per STA

Firmware sends the tx_duration for each in HTT_T2H_MSG_TYPE_PEER_STATS
msg. Fill the tx_duration sent by firmware in the tx stats information
per STA.

Tested HW: WCN3990
Tested FW: WLAN.HL.3.1-00784-QCAHLSWMTPLZ-1,
           WLAN.HL.2.0-01617-QCAHLSWMTPLZ-1
Signed-off-by: Surabhi Vishnoi <svishnoi@codeaurora.org>
Signed-off-by: Kalle Valo <kvalo@codeaurora.org>

drivers/net/wireless/ath/ath10k/htt_rx.c

@@ -2975,6 +2975,8 @@ ath10k_accumulate_per_peer_tx_stats(struct ath10k *ar,
 		STATS_OP_FMT(RETRY).rate_table[0][idx] += pstats->retry_bytes;
 		STATS_OP_FMT(RETRY).rate_table[1][idx] += pstats->retry_pkts;
 	}
+
+	tx_stats->tx_duration += pstats->duration;
 }
 
 static void
@@ -3141,6 +3143,7 @@ static void ath10k_htt_fetch_peer_stats(struct ath10k *ar,
 		p_tx_stats->succ_pkts = __le16_to_cpu(tx_stats->succ_pkts);
 		p_tx_stats->retry_pkts = __le16_to_cpu(tx_stats->retry_pkts);
 		p_tx_stats->failed_pkts = __le16_to_cpu(tx_stats->failed_pkts);
+		p_tx_stats->duration = __le16_to_cpu(tx_stats->tx_duration);
 
 		ath10k_update_per_peer_tx_stats(ar, sta, p_tx_stats);
 	}