qcacmn: Fix incorrect buffer for channel info in multiple vdev restart cmd

Channel information TLV pointer is not updated to the data offset once
TLV header is set. Fix by moving the pointer ahead by TLV header size.

Change-Id: I3c8ad7b690153745d92d51e4d9d1e377b149e1d2
CRs-Fixed: 2000449

wmi/src/wmi_unified_tlv.c

@@ -13519,7 +13519,7 @@ static QDF_STATUS send_multiple_vdev_restart_req_cmd_tlv(
 	WMITLV_SET_HDR(buf_ptr,
 		       WMITLV_TAG_STRUC_wmi_channel,
 		       WMITLV_GET_STRUCT_TLVLEN(wmi_channel));
-	chan_info = (wmi_channel *)(buf_ptr + WMI_TLV_HDR_SIZE);
+	chan_info = (wmi_channel *)buf_ptr;
 	tchan_info = &(param->ch_param);
 	chan_info->mhz = tchan_info->mhz;
 	chan_info->band_center_freq1 = tchan_info->cfreq1;