nixos/nvidia: make nvidia-frontend device major constant
nixos/nvidia: make nvidia-frontend device major constant

It is assigned by https://www.kernel.org/doc/Documentation/admin-guide/devices.txt
and never changes, so we can skip grep.

NixOS/nixpkgs,NixOS/nixpkgs,NixOS/nixpkgs,NixOS/nixpkgs,NixOS/nixpkgs,NixOS/nixpkgs,NixOS/nixpkgs,NixOS/nixpkgs,NixOS/nixpkgs,NixOS/nixpkgs,NixOS/nixpkgs,NixOS/nixpkgs,NixOS/nixpkgs,NixOS/nixpkgs,NixOS/nixpkgs