qcacmn: Allow zero channels list to send to fw for RSO

Host send number of channels = 0 and channel list type =
WMI_CHANNEL_LIST_STATIC in RSO command to firmware to clear static
channel list for ROAM SCAN in firmware.

Hence, at WMI layer check for chan_count is removed and channel list
type mapping is done irrespective of chan_count.

Change-Id: Ia3dded0d58e32570d3dd5f7193410909ecef0cc4
CRs-Fixed: 2579748

wmi/src/wmi_unified_roam_tlv.c

@@ -1882,11 +1882,6 @@ static QDF_STATUS send_roam_scan_offload_chan_list_cmd_tlv(wmi_unified_t wmi_han
 	wmi_roam_chan_list_fixed_param *chan_list_fp;
 	uint32_t *roam_chan_list_array;
 
-	if (chan_count == 0) {
-		WMI_LOGD("%s : invalid number of channels %d", __func__,
-			 chan_count);
-		return QDF_STATUS_E_EMPTY;
-	}
 	/* Channel list is a table of 2 TLV's */
 	list_tlv_len = WMI_TLV_HDR_SIZE + chan_count * sizeof(uint32_t);
 	len = sizeof(wmi_roam_chan_list_fixed_param) + list_tlv_len;
@@ -1903,7 +1898,7 @@ static QDF_STATUS send_roam_scan_offload_chan_list_cmd_tlv(wmi_unified_t wmi_han
 			       (wmi_roam_chan_list_fixed_param));
 	chan_list_fp->vdev_id = vdev_id;
 	chan_list_fp->num_chan = chan_count;
-	if (chan_count > 0 && list_type == WMI_CHANNEL_LIST_STATIC) {
+	if (list_type == WMI_CHANNEL_LIST_STATIC) {
 		/* external app is controlling channel list */
 		chan_list_fp->chan_list_type =
 			WMI_ROAM_SCAN_CHAN_LIST_TYPE_STATIC;