vboot: Include vb2_api.h, instead of lower-level vboot2 header files

This will allow vboot2 to continue refactoring without breaking
coreboot, since there's now only a single file which needs to stay in
sync.

BUG=chromium:423882
BRANCH=none
TEST=emerge-veyron_pinky coreboot
CQ-DEPEND=CL:233050

Original-Change-Id: I74cae5f0badfb2d795eb5420354b9e6d0b4710f7
Original-Signed-off-by: Randall Spangler <rspangler@chromium.org>
Original-Reviewed-on: https://chromium-review.googlesource.com/233051
Original-Reviewed-by: Daisuke Nojiri <dnojiri@chromium.org>

(cherry picked from commit df55e0365de8da85844f7e7b057ca5d2a9694a8b)
Signed-off-by: Aaron Durbin <adurbin@chromium.org>

Change-Id: I999af95ccf8c326f2fd2de0f7da50515e02ad904
Reviewed-on: http://review.coreboot.org/9446
Reviewed-by: Patrick Georgi <pgeorgi@google.com>
Tested-by: build bot (Jenkins)
diff --git a/src/vendorcode/google/chromeos/vboot2/vboot_handoff.c b/src/vendorcode/google/chromeos/vboot2/vboot_handoff.c
index 2dadffa..33ff79a 100644
--- a/src/vendorcode/google/chromeos/vboot2/vboot_handoff.c
+++ b/src/vendorcode/google/chromeos/vboot2/vboot_handoff.c
@@ -17,8 +17,6 @@
  * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301 USA
  */
 
-#include <2recovery_reasons.h>
-#include <2struct.h>
 #include <arch/stages.h>
 #include <assert.h>
 #include <stdint.h>
@@ -30,6 +28,8 @@
 #include <console/vtxprintf.h>
 #include <stdlib.h>
 #include <timestamp.h>
+#define NEED_VB20_INTERNALS  /* TODO: remove me! */
+#include <vb2_api.h>
 #include <vboot_struct.h>
 #include "../chromeos.h"
 #include "../fmap.h"