tpm: move tpm_validate_commmand() to tpm2-space.c

Move tpm_validate_command() to tpm2-space.c and make it part of the
tpm2_prepare_space() flow. Make cc resolution as part of the TPM space
functionality in order to detach it from rest of the tpm_transmit()
flow.

Cc: James Bottomley <James.Bottomley@HansenPartnership.com>
Signed-off-by: Jarkko Sakkinen <jarkko.sakkinen@linux.intel.com>
Reviewed-by: Stefan Berger <stefanb@linux.ibm.com>
Tested-by: Stefan Berger <stefanb@linux.ibm.com>
Reviewed-by: Jerry Snitselaar <jsnitsel@redhat.com>
Reviewed-by: James Bottomley <James.Bottomley@HansenPartnership.com>
Tested-by: Alexander Steffen <Alexander.Steffen@infineon.com>