qcacmn: Move wma_get_buf_start_scan_cmd to ucfg_scan_update_params

Move wma_get_buf_start_scan_cmd logic to common code in
ucfg_scan_update_params.

Change-Id: I4c9dcb48b4862ad10f64e260d87938251e270185
CRs-Fixed: 2180960

core/src/wlan_p2p_roc.c

@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2017 The Linux Foundation. All rights reserved.
+ * Copyright (c) 2017-2018 The Linux Foundation. All rights reserved.
  *
  * Permission to use, copy, modify, and/or distribute this software for
  * any purpose with or without fee is hereby granted, provided that the
@@ -101,6 +101,7 @@ static QDF_STATUS p2p_scan_start(struct p2p_roc_context *roc_ctx)
 	roc_ctx->scan_id = ucfg_scan_get_scan_id(p2p_soc_obj->soc);
 	req->vdev = vdev;
 	req->scan_req.scan_id = roc_ctx->scan_id;
+	req->scan_req.p2p_scan_type = SCAN_P2P_LISTEN;
 	req->scan_req.scan_req_id = p2p_soc_obj->scan_req_id;
 	req->scan_req.chan_list.num_chan = 1;
 	req->scan_req.chan_list.chan[0].freq = wlan_chan_to_freq(roc_ctx->chan);