It's not obvious how to set specific byte of a multi-byte field in the
set file. Add an example (and a template) for setting MAC address.
Change-Id: Iea983071682ffebd61757497d43c70cc8214043d
Signed-off-by: Evgeny Zinoviev <me@ch1p.io>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/39664
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Swift Geek (Sebastian Grzywna) <swiftgeek@gmail.com>
Reviewed-by: Angel Pons <th3fanbus@gmail.com>
Reviewed-by: Jacob Garber <jgarber1@ualberta.ca>