Add a prerequisites section to the Multitech Conduit AEP gateways doc for supporting LBS (TheThingsIndustries#402)

* doc: Add prerequisites section for MTCDT to support LBS

* doc: Change the contents of Warning message

Author: i3mSuperMan

doc/content/gateways/multitechconduit/lbs.md

@@ -7,6 +7,12 @@ This section contains instructions for connecting the Multitech Conduit AEP to {
 
 <!--more-->
 
+## Prerequisites:
+1. Multitech Conduit AEP gateway running [mPower 5.3.0 firmware or later](http://www.multitech.net/developer/downloads/).
+2. Hardware required: MTCDT with `MTAC-LORA-H mCard`
+
+{{< warning >}}{{% lbs %}} is not supported on Multitech Conduit gateways with [**MTAC-LORA-1.0**](http://www.multitech.net/developer/software/lora/running-basic-station-on-conduit/) USB cards. {{</ warning >}}
+
 To set up LoRa packet forwarding on the gateway, follow these steps.
 
 Click the **LoRaWAN** tab in the left menu.