ath10k: fix invalid survey reporting for QCA99X0

There are three WMI_CHAN_INFO events reported per channel
in QCA99X0 firmware. First one is a notification at the begining
of the channel dwell time with cmd_flag as CHAN_INFO_START(cmd_flag = 0),
second one is a notification at the end of the dwell time with cmd_flag
CHAN_INFO_PRE_COMPLETE (cmd_flag = 2) and the third is the indication
with CHAN_INFO_COMPLETE (cmd_flag = 1) which is the last indication for
the channel. Since there is a new state before the completion, the handler
is to fixed so that the counts are deducted from the ones reported with
CHAN_INFO_START rather than the ones reported with CHAN_INFO_PRE_COMPLETE.
Without this fix there will be lots of 0 msecs reported as active
and busy time.

Signed-off-by: Vasanthakumar Thiagarajan <vthiagar@qti.qualcomm.com>
Signed-off-by: Kalle Valo <kvalo@qca.qualcomm.com>

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

@@ -2412,8 +2412,10 @@ void ath10k_wmi_event_chan_info(struct ath10k *ar, struct sk_buff *skb)
 		ar->ch_info_can_report_survey = true;
 	}
 
+	if (!(cmd_flags & WMI_CHAN_INFO_FLAG_PRE_COMPLETE)) {
 		ar->survey_last_rx_clear_count = rx_clear_count;
 		ar->survey_last_cycle_count = cycle_count;
+	}
 
 exit:
 	spin_unlock_bh(&ar->data_lock);

drivers/net/wireless/ath/ath10k/wmi.h

@@ -5590,6 +5590,7 @@ struct wmi_peer_sta_kickout_event {
 } __packed;
 
 #define WMI_CHAN_INFO_FLAG_COMPLETE BIT(0)
+#define WMI_CHAN_INFO_FLAG_PRE_COMPLETE BIT(1)
 
 /* Beacon filter wmi command info */
 #define BCN_FLT_MAX_SUPPORTED_IES	256