intel/lynxpoint: Build intermediate step to add Lynx Point ME image

This is needed to successfully build fox_wtm2 from external repo.

BUG=chrome-os-partner:18638
BRANCH=none
TEST=manual: successfully compile coreboot for fox_wtm2 and
create an image with chromeos-bootimage/cros_bundle_firmware

Change-Id: Iaa4e9983faa1d86c2b29d8fd4f577be035497e38
Signed-off-by: Duncan Laurie <dlaurie@chromium.org>
Reviewed-on: https://gerrit.chromium.org/gerrit/48676
Reviewed-by: Aaron Durbin <adurbin@chromium.org>
Reviewed-on: http://review.coreboot.org/4132
Tested-by: build bot (Jenkins)
Reviewed-by: Patrick Georgi <patrick@georgi-clan.de>
lenovo/x60/i915.c: Use define for `BSM`

Although it builds without any further changes, including the header

	src/northbridge/intel/i945/i945.h

where `BSM` is defined, would be useful. Unfortunately that conflicts
with the already included header `southbridge/intel/bd82x6x/pch.h`,
so it is left as is.

Change-Id: I7c0a795338c34038169e082446907987364a0e88
Signed-off-by: Paul Menzel <paulepanter@users.sourceforge.net>
Reviewed-on: http://review.coreboot.org/5932
Tested-by: build bot (Jenkins)
Reviewed-by: Aaron Durbin <adurbin@google.com>