The format for VPD has changed s.t. the first NIC should
always have a zero concat to the end.
Adjust all the respective boards to shift back by one and
adjust drivers/net friends to remove the 'special casing'
of idx == 0.
Background:
https://chromeos.google.com/partner/dlm/docs/factory/vpd.html#field-ethernet_macn
V.2: Fixup a code comment typo while we are here.
V.3: Vary special casing semantics for idx==0 => default mac addr is set.
V.4: Rework to still support the legacy path.
BUG=b:152157720
BRANCH=none
TEST=none
Change-Id: Idf83cc621a9333186dabb668b22c4b78e211930a
Signed-off-by: Edward O'Callaghan <quasisec@google.com>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/39771
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Furquan Shaikh <furquan@google.com>
0e1380683f