Mimi reported that afb5abc2 reverts the fix in 398a1e71. This patch
reverts it back.

Fixes: afb5abc2 ("tpm: two-phase chip management functions")
Reported-by: NMimi Zohar <zohar@linux.vnet.ibm.com>
Signed-off-by: NJarkko Sakkinen <jarkko.sakkinen@linux.intel.com>
Acked-by: NPeter Huewe <PeterHuewe@gmx.de>