Add TPM version checking

Change-Id: Ic32b7bcf0bc5501e21dc84e79419a256d9b0d095

R=semenzato@chromium.org,reinauer@chromium.org
BUG=chrome-os-partner:2832
TEST=manual

crossystem tpm_fwver tpm_kernver
On a debug system, this will return 0x00010001 0x00010001

Review URL: http://codereview.chromium.org/6685075
8 files changed