Surely with Litening III and 4 Paveway IVs (or a mixed load of Paveway IV and laser brimstome) and the TIEC upgrade the Tornado will be a pretty capable CAS aircraft?
If they clear dual-store carriers (like days of old, carrying 1000lb GP bombs 8 at a time) you could conceivably carry even more Paveway IVs (up to 6 and a targetting pod), though there may be wiring issues for putting a GPS guided weapon on them (like the US found, having to modify VERs to carry JDAM). Possibly end up being a bit heavy for Afghanistan though...
By the time it goes to the stan I'd expect all the above weapons will have been fully cleared and at least enough airframes for Herrick will have received TIEC....