vboot: Add a new post code for TPM failure

If the kernel does not properly handle the TPM and send it a
TPM_SaveState command before suspend then it will not be in
the correct state on resume.  In order to easily detect this
case add a new post code for TPM failure and use it in the
vboot resume path.

BUG=chromium:371105
TEST=Build and boot on wtm2.

Original-Change-Id: I412520b521387a8e18ad1c6f5a64b39cdd5c88ec
Original-Signed-off-by: Duncan Laurie <dlaurie@chromium.org>
Original-Reviewed-on: https://chromium-review.googlesource.com/199371
Original-Reviewed-by: Aaron Durbin <adurbin@chromium.org>
(cherry picked from commit ff2f0dc56c1a783295710f81567af02729fe1da2)
Signed-off-by: Marc Jones <marc.jones@se-eng.com>

Change-Id: I5baf894fd72922acd79d191e5485ae8ef7e0d559
Reviewed-on: http://review.coreboot.org/7936
Tested-by: build bot (Jenkins)
Reviewed-by: Kyösti Mälkki <kyosti.malkki@gmail.com>

src/include/console/post_codes.h

@@ -219,6 +219,13 @@
  */
 #define POST_JUMPING_TO_PAYLOAD			0xf3
 
+/**
+ * \brief TPM failure
+ *
+ * An error with the TPM, either unexepcted state or communications failure.
+ */
+#define POST_TPM_FAILURE			0xed
+
 /**
  * \brief Not supposed to get here
  *

src/vendorcode/google/chromeos/vboot.c

@@ -233,6 +233,7 @@ static void init_vboot(int bootmode)
 
 #if !MOCK_TPM
 	printk(BIOS_ERR, "TPM: Error code 0x%x. Hard reset!\n", result);
+	post_code(POST_TPM_FAILURE);
 	hard_reset();
 #endif
 }