DJ: change the way we blacklist the devices

Previous implementaion consisted in:
- overwritting the pid of the device with a known blacklisted one (a receiver)
- logi_dj_probe failed due to some obscure reasons
- then we checked the wpid by hand

Now, we reimplemented hid_add_device, which means that it keeps the group.
Then, the code is the same in wtp than it will be upstream.

The only problem is that we lose hid_debug functionality.
Install: create systemd rule to remove hid-generic binding

In case a USB device is bound to hid-generic (a priori Bluetooth),
create a systemd rule which rebinds it to the correct driver.