Move files around...

- "kernel" and "repos.nix" --> "common/"
- "firmware/surface-go/ath10k" --> "surface-go/firmware/ath10k"
- Update where "kernel", "firmware/surface-go" and "repos.nix" can be found

microsoft/surface/common/kernel/linux-5.19.17/default.nix

@@ -0,0 +1,37 @@
+{ config, lib, pkgs, ... }:
+
+let
+  inherit (lib) mkIf mkOption types;
+  inherit (pkgs) fetchurl;
+
+  inherit (pkgs.callPackage ../linux-package.nix { }) linuxPackage repos;
+
+  cfg = config.microsoft-surface;
+
+  version = "5.19.17";
+  extraMeta.branch = "5.19";
+  patchDir = repos.linux-surface + "/patches/${extraMeta.branch}";
+  kernelPatches = pkgs.callPackage ./patches.nix {
+    inherit (lib) kernel;
+    inherit version patchDir;
+  };
+
+  kernelPackages = linuxPackage {
+    inherit version extraMeta kernelPatches;
+    src = fetchurl {
+      url = "mirror://kernel/linux/kernel/v5.x/linux-${version}.tar.xz";
+      sha256 = "sha256-yTuzhKl60fCk8Y5ELOApEkJyL3gCPspliyI0RUHwlIk=";
+    };
+  };
+
+in {
+  options.microsoft-surface.kernelVersion = mkOption {
+    type = types.enum [ "5.19.17" ];
+  };
+
+  config = mkIf (cfg.kernelVersion == "5.19.17") {
+    boot = {
+      inherit kernelPackages;
+    };
+  };
+}