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TPM2_PCR_Allocate command is required to reconfigure a TPM device to enable or disable algorithms in run-time, thus this patch introduces the implementation of PCR allocate APIs and adds related cmd functions for testing. To test the feature, ensure that TPM is started up. Run pcr_allocate command to turn on/off an algorithm, multiple calls are supported and all changes will be cached: `tpm2 pcr_allocate <algorithm_name> <on|off>` Run startup command with argument 'off' to shutdown the TPM. `tpm2 startup TPM2_SU_CLEAR off` Reboot the board via `reset` to activate the changes. Signed-off-by: Raymond Mao <raymond.mao@linaro.org> Acked-by: Ilias Apalodimas <ilias.apalodimas@linaro.org> Signed-off-by: Ilias Apalodimas <ilias.apalodimas@linaro.org>