build system: add manual board id support

This patch adds manual board id support to coreboot and
selects manual board ids vs automatic (ie strap based)
where appropriate in the mainboards.

CQ-DEPEND=CL:262935
BRANCH=none
BUG=chrome-os-partner:37593
TEST=emerge-urara coreboot, see no board_id file
     emerge-buranku coreboot, see board_id file

Change-Id: Ia04e5498a01f35c5418698ecaf3197f56415e789
Signed-off-by: Patrick Georgi <pgeorgi@chromium.org>
Original-Commit-Id: 3bdb1fa092005be24de9fc68998053982648da85
Original-Change-Id: I4f0820233a485bf92598a739b81be2076d4e6ae7
Original-Signed-off-by: Stefan Reinauer <reinauer@chromium.org>
Original-Reviewed-on: https://chromium-review.googlesource.com/262745
Original-Reviewed-by: Vadim Bendebury <vbendeb@google.com>
Reviewed-on: http://review.coreboot.org/9905
Tested-by: build bot (Jenkins)
Reviewed-by: Stefan Reinauer <stefan.reinauer@coreboot.org>
diff --git a/src/lib/coreboot_table.c b/src/lib/coreboot_table.c
index b62f452..8319c03 100644
--- a/src/lib/coreboot_table.c
+++ b/src/lib/coreboot_table.c
@@ -218,7 +218,7 @@
 
 static void lb_board_id(struct lb_header *header)
 {
-#if CONFIG_BOARD_ID_SUPPORT
+#if CONFIG_BOARD_ID_AUTO || CONFIG_BOARD_ID_MANUAL
 	struct lb_board_id  *bid;
 
 	bid = (struct lb_board_id *)lb_new_record(header);