Add option to use mocked TPM driver
Some ARM boards, such as Seaboard, have buggy TPM chip that bricks the borad.
This commit adds a option to use mocked TPM driver.
R=rongchang@chromium.org,rspangler@chromium.org,wad@chromium.org
BUG=chromium-os:14239
TEST=Run verified boot on Seaboard
Review URL: http://codereview.chromium.org/6883040
Change-Id: Iae6133f081c2e3d9daa4e14bb711550e2658e9df
diff --git a/Makefile b/Makefile
index f1c4b60..9363154 100644
--- a/Makefile
+++ b/Makefile
@@ -3,6 +3,7 @@
# found in the LICENSE file.
export FIRMWARE_ARCH
+export MOCK_TPM
export CC ?= gcc
export CXX ?= g++