The ClearFog Pro is basically the same thing as the ClearFog Base + an extra 6 port Switch instead of the second NIC port of the "Base" version (+ a few minor extras).
DTB wise, the device should work "out of the box" as the ClearFog Base dtb had to be "fixed" to not use a switch like the "Pro" (which it does not have).
The rest of the configuration/procedure should be pretty much the same as the ClearFog Base version, so please read there: ClearFog Base / Pro for further info!