lenovo/thinkpad/t495: init from e495.

The E495 and T495 are based on the same core Ryzen platform, so the
E495 tweaks apply similarly to the T495.

Tested on my own T495, works well.

lenovo/thinkpad/t495/default.nix

@@ -0,0 +1,11 @@
+{ config, lib, pkgs, ... }:
+
+{
+  imports = [
+    ../.
+    ../../../common/cpu/amd
+  ];
+
+  # see https://github.com/NixOS/nixpkgs/issues/69289
+  boot.kernelPackages = lib.mkIf (lib.versionOlder pkgs.linux.version "5.2") pkgs.linuxPackages_latest;
+}