NKRO not working on Linux by default.

I'm thinking that OpCodes_Info_2::Unk_02 will switch the keyboard into a mode that allows NKRO, and it always returns -1 so no need for any checking. Basically ignoring error here that technically is not a real error. Not tested yet, if it turns out it is what I'm thinking then this issue can be closed but if not then I will have to catch all packets when connecting to the keyboard with Wireshark on Windows because NKRO works there and figure it out somehow ¯_(ツ)_/¯