tpm: wipe tpm2_get_timeouts()

According to the PTP specification in TPM2 timeouts and durations
are constants. The only reason for having this functions was using
the update_timeouts() callback that was used only for resolving TPM1
chipset related quirks. That's why it does not make sense to have
this function at all.

Signed-off-by: Jarkko Sakkinen <jarkko.sakkinen@linux.intel.com>