Allow user USB access to FTDI device in tent

Reviewed-by: Aleix Boné <abonerib@bsc.es>

m/module/tc1-board.nix

@@ -0,0 +1,15 @@
+{ lib, pkgs, ... }:
+
+{
+  # Allow user access to FTDI USB device
+  services.udev.packages = lib.singleton (pkgs.writeTextFile {
+    # Needs to be < 73
+    name = "60-ftdi-tc1.rules";
+    text = ''
+      # Bus 003 Device 003: ID 0403:6011 Future Technology Devices International, Ltd FT4232H Quad HS USB-UART/FIFO IC
+      # Use := to make sure it doesn't get changed later
+      SUBSYSTEMS=="usb", ATTRS{idVendor}=="0403", ATTRS{idProduct}=="6011", MODE:="0666"
+    '';
+    destination = "/etc/udev/rules.d/60-ftdi-tc1.rules";
+  });
+}

m/tent/configuration.nix

@@ -16,6 +16,7 @@
     ../module/p.nix
     ../module/vpn-dac.nix
     ../module/hut-substituter.nix
+    ../module/tc1-board.nix
   ];
 
   # Select the this using the ID to avoid mismatches