chore(users): grfn -> aspen

Change-Id: I6c6847fac56f0a9a1a2209792e00a3aec5e672b9
Reviewed-on: https://cl.tvl.fyi/c/depot/+/10809
Autosubmit: aspen <root@gws.fyi>
Reviewed-by: sterni <sternenseemann@systemli.org>
Tested-by: BuildkiteCI
Reviewed-by: lukegb <lukegb@tvl.fyi>

users/aspen/system/home/modules/rtlsdr.nix

@@ -0,0 +1,23 @@
+{ config, lib, pkgs, ... }:
+
+let
+
+  nixpkgs-gnuradio = import
+    (pkgs.fetchFromGitHub {
+      owner = "doronbehar";
+      repo = "nixpkgs";
+      rev = "712561aa5f10bfe6112a1726a912585612a70d1f";
+      sha256 = "04yqflbwjcfl9vlplphpj82csqqz9k6m3nj1ybhwgmsc4by7vivl";
+    })
+    { };
+
+in
+
+{
+  home.packages = with pkgs; [
+    rtl-sdr
+    nixpkgs-gnuradio.gnuradio
+    nixpkgs-gnuradio.gnuradio.plugins.osmosdr
+    nixpkgs-gnuradio.gqrx
+  ];
+}