darp6: ISO keyboard layout is not shown in the configurator

[leviport]

While testing the open EC transition on darp6, I discovered that the configurator does not properly show the ISO keyboard layout that was offered for a time on darp6. I can still remap all of the keys except for the extra one next to left shift (marked as the \ / | key on the legend). The ~ / # key next to the tall enter key can be remapped since the firmware thinks it is the \ / | key, but its physical location isn't reflected on the configurator's keymap.

[ids1024]

Hm, I'm not sure if the EC API currently exposes the necessary information for the Configurator to know it is an ISO keyboard. system76_ectool info pressumably displays the same thing as the ANSI variant. If keymap_get errors trying to get the extra key on an ANSI keyboard, but works on ISO keyboard, that would work. Otherwise I guess it requires a change to the EC firmware as well.