qcacmn: Add CDP API to get peer wlanstats ctx

Peer wlanstats context was accessed directly from
PPDU cookie, with this approach the cookie pointer
may become stale if peer goes for deletion

Hence access the wlanstats context using CDP API
with stats context protection

CRs-Fixed: 2740261
Change-Id: I54c785325f8852ad422f05527b98ebca6e4d6cf0

dp/wifi3.0/dp_htt.c

@@ -2678,6 +2678,7 @@ static void dp_process_ppdu_stats_user_cmpltn_common_tlv(
 	if (qdf_likely(ppdu_user_desc->completion_status ==
 			HTT_PPDU_STATS_USER_STATUS_OK)) {
 		ppdu_desc->ack_rssi = dp_stats_buf->ack_rssi;
+		ppdu_user_desc->usr_ack_rssi = dp_stats_buf->ack_rssi;
 		ppdu_user_desc->ack_rssi_valid = 1;
 	} else {
 		ppdu_user_desc->ack_rssi_valid = 0;
@@ -3514,8 +3515,6 @@ dp_ppdu_desc_user_stats_update(struct dp_pdev *pdev,
 		if (!peer)
 			continue;
 
-		ppdu_desc->user[i].cookie = (void *)peer->wlanstats_ctx;
-
 		/*
 		 * different frame like DATA, BAR or CTRL has different
 		 * tlv bitmap expected. Apart from ACK_BA_STATUS TLV, we