nixos: k0: nvidia: use legacy driver
nixos: k0: nvidia: use legacy driver

We use version 470 because it is the last version before the troublesome
495.xx became stable, at least according to the commit message of
https://github.com/NixOS/nixpkgs/commit/f8d38db8d7c995e0e20ab6b4e48cac26c2ef0dfa.

listx/syscfg,listx/syscfg,listx/syscfg,listx/syscfg,listx/syscfg