marvell/bg4cd: merge verstage into bootblock

If verified boot is enabled, merge verstage into bootblock. This also
requires custom bootblock code to actually call into verstage.
[pg: modified to match upstream]

BUG=chrome-os-partner:32631
BRANCH=ToT
TEST=booted on cosmos development board.

Change-Id: I53251aac966ee15da24232c23fefa636de8b253b
Signed-off-by: Patrick Georgi <pgeorgi@chromium.org>
Original-Commit-Id: 2b8ada263017b46afa755b5acb759574184dba06
Original-Signed-off-by: Daisuke Nojiri <dnojiri@chromium.org>
Original-Change-Id: Ia0e1236357aa32bf553fb8cc98f3a8d29de17f45
Original-Reviewed-on: https://chromium-review.googlesource.com/229795
Original-Reviewed-by: Julius Werner <jwerner@chromium.org>
Reviewed-on: http://review.coreboot.org/10008
Tested-by: build bot (Jenkins)
Reviewed-by: Paul Menzel <paulepanter@users.sourceforge.net>
Reviewed-by: Stefan Reinauer <stefan.reinauer@coreboot.org>
diff --git a/src/soc/marvell/bg4cd/Makefile.inc b/src/soc/marvell/bg4cd/Makefile.inc
index 4cbca00..a540250 100644
--- a/src/soc/marvell/bg4cd/Makefile.inc
+++ b/src/soc/marvell/bg4cd/Makefile.inc
@@ -17,6 +17,9 @@
 ## Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
 ##
 
+bootblock-$(CONFIG_VBOOT2_VERIFY_FIRMWARE) += bootblock_asm.S
+bootblock-$(CONFIG_VBOOT2_VERIFY_FIRMWARE) += bootblock.c
+
 bootblock-y += cbmem.c
 bootblock-y += i2c.c
 bootblock-y += monotonic_timer.c