corenix: change uwu coreboot to use grub2

infra/corenix/configs/kookie/uwu.nix

@@ -3,7 +3,21 @@
 {
   imports = [ ../boards/x230.nix ../common.nix ];
 
-  seabios.enable = true;
+  grub2 = {
+    enable = true;
+    extraPayloadModules = [ "luks" "crypto" "gcry_sha256"
+                            "gcry_rijndael" "pbkdf2" ];
+    extraConfig = ''
+      menuentry "NixOS" {
+        cryptomount -u f1440abd-99e3-46a8-aa36-7824972fee54
+        search --set=drive1 --fs-uuid 672c497c-18aa-4b00-ac95-78e810363d81
+        set root=$drive1
+        configfile /grub/grub.cfg
+      }
+    '';
+  };
+  
+  seabios.asSecondaryPayload = true;
 
   corenix = {
     corebootConfig = {
@@ -12,6 +26,5 @@
     };
     
     extraFiles."background.png".src = lib.mkForce ./splash.jpg;
-    
   };
 }

infra/corenix/flake.nix

@@ -36,7 +36,6 @@
         milan-x1c = makeDevice ./configs/milan/milan-x1c.nix;
         milan-x230t = makeDevice ./configs/milan/milan-x230t.nix;
         milan-x230-fhd = makeDevice ./configs/milan/milan-x230-fhd.nix;
-        kookie-uwu = makeDevice ./configs/kookie/uwu.nix;
       };
 
     in {