Add qt840a

Note this is the same pcb as the iv12-tvbox, except that it uses an
ap6330 wifi/bt module where as the iv12-tvbox fex file is for boards with
an ap6210 wifi.bt module. The ap6210 uses wifi_mod_sel = 7 whwre as
the ap6330 uses wifi_mod_sel = 8.

Signed-off-by: Amit Kucheria <amit.kucheria@verdurent.com>
Signed-off-by: Hans de Goede <hdegoede@redhat.com>