qcacmn: If scan is for single channel don't filter the channel

Scan is rejected if single DFS channel is requested with
gEnableDFSChnlScan set to 0.

Fix is to allow single DFS channel scan and not to filter the
DFS channels.

Change-Id: Ifea85c7c85d3ace6cf08984c8c8e8ef00623303c
CRs-Fixed: 2454535

umac/scan/core/src/wlan_scan_manager.c

@@ -797,14 +797,13 @@ scm_update_channel_list(struct scan_start_request *req,
 	if (req->scan_req.scan_type == SCAN_TYPE_P2P_SEARCH)
 		p2p_search = true;
 	/*
-	 * No need to update channels if req is passive scan and single channel
-	 * ie ROC, Preauth etc.
+	 * No need to update channels if req is single channel* ie ROC,
+	 * Preauth or a single channel scan etc.
 	 * If the single chan in the scan channel list is an NOL channel,it is
 	 * not removed as it would reduce the number of scan channels to 0
 	 * and FW would scan all chans which is unexpected in this scenerio.
 	 */
-	if (req->scan_req.scan_f_passive &&
-	    req->scan_req.chan_list.num_chan == 1)
+	if (req->scan_req.chan_list.num_chan == 1)
 		return;
 
 	/* do this only for STA and P2P-CLI mode */