selftests: add TPM 2.0 tests

Added the tests that I've been using for testing TPM 2.0 functionality
for a long time but have been out-of-tree so far, residing in

https://github.com/jsakkine-intel/tpm2-scripts



Cc: Tadeusz Struk <tadeusz.struk@intel.com>
Signed-off-by: Jarkko Sakkinen <jarkko.sakkinen@linux.intel.com>
Acked-by: Joey Pabalinas <joeypabalinas@gmail.com>
Reviewed-by: Petr Vorel <petr.vorel@gmail.com>