init overridetree.cb based on the latest schematic.
BUG=b:237628218
TEST=USE="project_joxer emerge-nissa coreboot"
Signed-off-by: Mark Hsieh <mark_hsieh@wistron.corp-partner.google.com>
Change-Id: I22778cc2582abdc2e62d98c6b049a0fa4dd467e6
Reviewed-on: https://review.coreboot.org/c/coreboot/+/65662
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Reka Norman <rekanorman@chromium.org>