tcgbios: Implement menu to clear TPM 2 and activate its PCR banks

Implement a TPM 2 menu and enable the user to clear the TPM
and its activate PCR banks.

The main TPM menu is activated by pressing the 't' key during
firmware startup.

Signed-off-by: Stefan Berger <stefanb@linux.ibm.com>
Signed-off-by: Kevin O'Connor <kevin@koconnor.net>
Signed-off-by: Alexey Kardashevskiy <aik@ozlabs.ru>
7 files changed