Draft: bpf: add a BPF fixup for the XPPen ACK05 remote
This remote is a classic button box, and it exports the regular keys as various key sequences.
Convert it into a proper tablet pad, and report BTN_0 -> BTN_9 for the key presses, and wheel events like any other tablet pad.
We make the assumption that only one key can be reported at a time. -> we report all keys as they are pressed now.
Fixes: #32
@Deevad, this is a WIP, but should work in case the device only supports one key at a time.
Edited by Benjamin Tissoires