vtpmmgr: Print error code to aid debugging

vtpmmgr: Print error code to aid debugging

tpm_get_error_name returns "Unknown Error Code" when an error string
is not defined.  In that case, we should print the Error Code so it can
be looked up offline.  tpm_get_error_name returns a const string, so
just have the two callers always print the error code so it is always
available.

Signed-off-by: Jason Andryuk <jandryuk@gmail.com>
Reviewed-by: Samuel Thibault <samuel.thibault@ens-lyon.org>
Reviewed-by: Daniel P. Smith <dpsmith@apertussolutions.com>