qcacmn: Reduce gscan priority

qcacld-2.0 to qcacmn propagation

gscan priority should not cross normal scan.

Add changes to reduce gscan priority.

CRs-Fixed: 1066785
Change-Id: I7459367cfed5d932f07f8c846265c448b9a84555

wmi/src/wmi_unified_tlv.c

@@ -5716,7 +5716,7 @@ QDF_STATUS wmi_get_buf_extscan_start_cmd(wmi_unified_t wmi_handle,
 			       WMI_SCAN_ADD_DS_IE_IN_PROBE_REQ;
 	WMI_SCAN_SET_DWELL_MODE(cmd->scan_ctrl_flags,
 			pstart->extscan_adaptive_dwell_mode);
-	cmd->scan_priority = WMI_SCAN_PRIORITY_HIGH;
+	cmd->scan_priority = WMI_SCAN_PRIORITY_VERY_LOW;
 	cmd->num_ssids = 0;
 	cmd->num_bssid = 0;
 	cmd->ie_len = 0;