Add the file templates for creating a new variant of Brya.
BUG=b:177017247
Signed-off-by: Paul Fagerburg <pfagerburg@google.com>
Change-Id: If141d9b43ea5b845c1855f12e03e7d0cf535d2ec
Reviewed-on: https://review.coreboot.org/c/coreboot/+/54489
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Tim Wawrzynczak <twawrzynczak@chromium.org>