Switch all config options that can be toggled to "=n" when not active from board configs

[tlaurion]

config-gui.sh is growing in features.

Current board configs either comment board options when deactivated or set them to option=n

The later is better, concrete example:

• DEBUG is commented in board config, which is packed into CBFS through board.cpio. Since this is commented, the debug=x doesn't exist (not considered)
• User toggles debugging into config gui. This sets debug=y into config.user overlay, which is applied on boot by cbfs-init.sh and considered when flashed to rom and rebooted.
• Heads picks the change as tampering. User can reseal or not secrets, produce debug.log and upload for bug report.
• User deactivated debug, expects logic to save as override which if the same as board config, produce no change and save, flash back to cbfs, reboot
• since board config never had debug=n, but now config.user has debug=n, Heads measures config.user and sees a change, reports it as tampering.
• User has to reseal secrets since debug=n was never set at the first place.

Tldr: if we want users to be able to test settings without resealing and rollback, options that are deactivated needs to be set to =n in board config so that when toggled back, Heads doesn't see a change because there are none.