slight refactor/rocm packages

modules/hardware/graphics/i915.nix

@@ -13,12 +13,14 @@ in {
   };
 
   config = mkIf cfg.enable {
+    # top
     environment.systemPackages = with pkgs; [ intel-gpu-tools ];
     hardware.intel-gpu-tools.enable = true;
 
     boot.kernelParams = [
       # enable gpu virtualization
       "i915.enable_gvt=1"
+      # explicitly enable power saving options (framebuffer compression)
     ] ++ optional cfg.powersave "i915.enable_fbc=1";
   };
 }