Add Odroid M1

[KhashayarDanesh]

Description of changes

I've added the Odroid M1 to nixos-hardware.

Things done

• [X] Tested the changes in your own NixOS Configuration.
• [X] Tested the changes end-to-end by using your fork of nixos-hardware and importing it via <nixos-hardware> or Flake input.
• [X] Ran the tests and it went well.
• [X] Added the new device to the flake.nix file and readme as well.