Add config for busch

Busch is the proxmox host used for various vms, which will be defined
through terraform or similar.

hosts/busch/hardware-configuration.nix

@@ -0,0 +1,22 @@
+# Do not modify this file!  It was generated by ‘nixos-generate-config’
+# and may be overwritten by future invocations.  Please make changes
+# to /etc/nixos/configuration.nix instead.
+{ config, lib, pkgs, modulesPath, ... }:
+
+{
+  imports =
+    [ (modulesPath + "/installer/scan/not-detected.nix")
+    ];
+
+  boot.initrd.availableKernelModules = [ "ahci" "xhci_pci" "ehci_pci" "mpt3sas" "usbhid" "usb_storage" "sr_mod" ];
+  boot.initrd.kernelModules = [ "vfio_pci" "vfio" "vfio_iommu_type1" ];
+  boot.kernelModules = [ "kvm-intel" ];
+  boot.extraModulePackages = [ ];
+  boot.kernelParams = [ "intel_iommu=on" "iommu=pt" "vfio-pci.ids=1000:0087" ];
+
+  networking.useDHCP = lib.mkDefault true;
+  # networking.interfaces.enp1s0.useDHCP = lib.mkDefault true;
+
+  nixpkgs.hostPlatform = lib.mkDefault "x86_64-linux";
+  hardware.cpu.intel.updateMicrocode = lib.mkDefault config.hardware.enableRedistributableFirmware;
+}