yarn: PROPERLY enable amdgpu overdrive

modules/desktop-common.nix

@@ -28,8 +28,9 @@
     inputs.nixos-hardware.nixosModules.common-pc-ssd
   ];
 
-  # allow overclocking (I actually underclock but lol)
-  hardware.amdgpu.overdrive.ppfeaturemask = "0xFFFFFFFF";
+  # expose amdgpu overdrive sysfs (pp_od_clk_voltage, fan curves, ...) for LACT.
+  # nixpkgs default ppfeaturemask (0xfffd7fff) already has the overdrive bit set.
+  hardware.amdgpu.overdrive.enable = true;
 
   # Add niri to display manager session packages
   services.displayManager.sessionPackages = [ niri-package ];