Add ODroid M1

Based on @KhashayarDanesh's work in #1269, which is also based on the
work of @sstent and @povik.

Closes #1269

hardkernel/odroid-m1/default.nix

@@ -0,0 +1,31 @@
+# Based on kboot-conf by original authors povik and sstent.
+# I'm just porting things over. the original work can be viewed at:
+# https://github.com/sstent/nixos-on-odroid-m1
+# https://github.com/povik/nixos-on-odroid-n2
+{ config, pkgs, lib, ... }:
+
+{
+  imports = [
+    ./kboot-conf
+  ];
+
+  #boot.loader.grub.enable = false;
+  boot.loader.kboot-conf.enable = true;
+  # Use kernel >6.6 The devicetree is missing from kernel versions older than this.
+  boot.kernelPackages = lib.mkIf (lib.versionOlder pkgs.linux.version "6.6") (lib.mkDefault pkgs.linuxPackages_latest);
+  boot.supportedFilesystems = lib.mkForce ["btrfs" "cifs" "f2fs" "jfs" "ntfs" "reiserfs" "vfat" "xfs"];
+  # I'm not completely sure if some of these could be omitted,
+  # but want to make sure disk access works
+  boot.initrd.availableKernelModules = [
+    "nvme"
+    "nvme-core"
+    "phy-rockchip-naneng-combphy"
+    "phy-rockchip-snps-pcie3"
+  ];
+
+  # Petitboot uses this port and baud rate on the boards serial port,
+  # it's probably good to keep the options same for the running
+  # kernel for serial console access to work well
+  boot.kernelParams = ["console=ttyS2,1500000"];
+  hardware.deviceTree.name = "rockchip/rk3568-odroid-m1.dtb";
+}