qcacmn: fix memory leak issue in tx mgmt ctrl payload tlv

fix memory leak issue in tx mgmt ctrl payload tlv.
if any of the mgmt or pkt capture feature is turned on.
htt_t2h_msg is hold in mgmt_buf and not set to NULL on free.
which cause leaking next target to host nbuf.

Change-Id: I0d9e0194e51a21b348aadf747b8c9def5c245eda

dp/wifi3.0/dp_htt.c

@@ -3030,17 +3030,15 @@ static bool dp_txrx_ppdu_stats_handler(struct dp_soc *soc,
 		    (pdev, htt_t2h_msg, pdev->mgmtctrl_frm_info.ppdu_id) !=
 		    QDF_STATUS_SUCCESS)
 			free_buf = false;
-
-		if (free_buf) {
-			pdev->mgmtctrl_frm_info.mgmt_buf = NULL;
-			pdev->mgmtctrl_frm_info.mgmt_buf_len = 0;
-			pdev->mgmtctrl_frm_info.ppdu_id = 0;
-		}
 	}
 
 	if (ppdu_info)
 		dp_ppdu_desc_deliver(pdev, ppdu_info);
 
+	pdev->mgmtctrl_frm_info.mgmt_buf = NULL;
+	pdev->mgmtctrl_frm_info.mgmt_buf_len = 0;
+	pdev->mgmtctrl_frm_info.ppdu_id = 0;
+
 	return free_buf;
 }
 #else