Add support for querying TPM DAD counter on more systems.

Previously only Infineon TPMs were queried.

BUG=none
TEST=Manually checked histograms on the following platforms:
- parrot->nuvoton tpm
- stout->stmicro tpm

Change-Id: I641571f9d63e94f44a402053ef3ff976ef580edb
Reviewed-on: https://chromium-review.googlesource.com/204486
Reviewed-by: Luigi Semenzato <semenzato@chromium.org>
Commit-Queue: Darren Krahn <dkrahn@chromium.org>
Tested-by: Darren Krahn <dkrahn@chromium.org>
1 file changed