Include board ID calculations only when necessary

For the majority of Chrome OS boards there is no need to include board
ID calculation in any stage but ramstage, where the ID should be
available for inclusion into the coreboot table.

BUG=chrome-os-partner:30489
TEST=build only, no other tests yet

Change-Id: I1451d52382bc48cc126d40267e0f61712f4a6d4b
Original-Change-Id: Ib9c06698a399d31e79a9b14143343ba2ad46d0fb
Original-Signed-off-by: Vadim Bendebury <vbendeb@chromium.org>
Original-Reviewed-on: https://chromium-review.googlesource.com/210117
Original-Reviewed-by: Julius Werner <jwerner@chromium.org>
(cherry picked from commit 27dd40e85bfcd0a38f388bad4d79f5fbb77a7566)
Signed-off-by: Marc Jones <marc.jones@se-eng.com>
Reviewed-on: http://review.coreboot.org/8720
Tested-by: build bot (Jenkins)
Reviewed-by: Patrick Georgi <pgeorgi@google.com>
5 files changed