security/vboot: Add measured boot mode

* Introduce a measured boot mode into vboot.
* Add hook for stage measurements in prog_loader and cbfs.
* Implement and hook-up CRTM in vboot and check for suspend.

Change-Id: I339a2f1051e44f36aba9f99828f130592a09355e
Signed-off-by: Philipp Deppenwiese <zaolin.daisuki@gmail.com>
Signed-off-by: Werner Zeh <werner.zeh@siemens.com>
Reviewed-on: https://review.coreboot.org/c/29547
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>

src/cpu/intel/model_206ax/Makefile.inc

@@ -19,6 +19,7 @@ smm-$(CONFIG_HAVE_SMI_HANDLER) += common.c
 
 ramstage-y += tsc_freq.c
 romstage-y += tsc_freq.c
+postcar-y += tsc_freq.c
 smm-$(CONFIG_HAVE_SMI_HANDLER) += tsc_freq.c
 
 smm-$(CONFIG_HAVE_SMI_HANDLER) += finalize.c