tpm: tpm-interface: fix tpm_transmit/_cmd kdoc

Fix tmp_ -> tpm_ typo and add reference to 'space' parameter
in kdoc for tpm_transmit and tpm_transmit_cmd functions.

Signed-off-by: Tomas Winkler <tomas.winkler@intel.com>
Reviewed-by: Jarkko Sakkinen <jarkko.sakkinen@linux.intel.com>
Signed-off-by: Jarkko Sakkinen <jarkko.sakkinen@linux.intel.com>