util/liveiso: Use programs.flashrom.enable

NixOS 21.11 introduced the option `programs.flashrom.enable`. The option
allows installing flashrom and hooking up its udev rules. Thus, set it
to `true` and add the user `user` to the `flashrom` group allowing it to
use the programmers.

Change-Id: I017ddb4314702a5252dfc0d05cd1e4961043d23b
Signed-off-by: Felix Singer <felixsinger@posteo.net>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/62193
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Michael Niewöhner <foss@mniewoehner.de>

util/liveiso/common.nix

@@ -93,12 +93,14 @@
 			user = {
 				isNormalUser = true;
 				group = "user";
-				extraGroups = [ "users" "wheel" "networkmanager" "uucp" ];
+				extraGroups = [ "users" "wheel" "networkmanager" "uucp" "flashrom" ];
 				initialHashedPassword = "";
 			};
 		};
 	};
 
+	programs.flashrom.enable = true;
+
 	environment.systemPackages = with pkgs; [
 		acpica-tools
 		btrfs-progs
@@ -116,7 +118,6 @@
 		efivar
 		exfat
 		f2fs-tools
-		flashrom
 		fuse
 		fuse3
 		fwts

util/liveiso/description.md

@@ -5,8 +5,6 @@
 NixOS configuration files for testing purposes and for working on firmware.
 
 ## TODO
-- Use programs.flashrom.enable (#128205) and add `user` to `flashrom` group.
-  Will be usable from the next NixOS release.
 - Generate customized bootloader configs; FILO is WIP
 - Add coreboot toolchain
 - Switch to `programs.neovim` when the module is fixed.