lib/systems/platforms: armv7l-hf-multiplatform: fix kernel build
lib/systems/platforms: armv7l-hf-multiplatform: fix kernel build

autoModules triggers a build system bug where ks8851_mll needs to be built-in if
ks8851 is also built-in.

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