tss2: Add TPM 2.0 NV index commands

tss2: Add TPM 2.0 NV index commands

The following TPM 2.0 commands are introduced to tss2 to access the
TPM non-volatile memory associated with the NV index handles:
  - TPM2_NV_DefineSpace,
  - TPM2_NV_UndefineSpace,
  - TPM2_NV_ReadPublic,
  - TPM2_NV_Read,
  - TPM2_NV_Write.

The related marshal/unmarshal functions are also introduced.

Signed-off-by: Gary Lin <glin@suse.com>
Reviewed-by: Stefan Berger <stefanb@linux.ibm.com>
Reviewed-by: Daniel Kiper <daniel.kiper@oracle.com>