This is a no-op change moving some common code out of tpmtest.py,
preparing it to support different testing modes.
BRANCH=none
BUG=chrome-os-partner:43025
TEST=the AES test still succeeds:
$ test/tpm_test/tpmtest.py
Starting MPSSE at 800 kHz
Connected to device vid:did:rid of 1ae0:0028:00
SUCCESS: AES:ECB common
SUCCESS: AES:ECB128 1
SUCCESS: AES:ECB192 1
SUCCESS: AES:ECB256 1
SUCCESS: AES:ECB256 2
SUCCESS: AES:CTR128I 1
SUCCESS: AES:CTR256I 1
Change-Id: Ia6e0e3e89f99875297da0a4f6137de5901c8ca08
Signed-off-by: Vadim Bendebury <vbendeb@chromium.org>
Reviewed-on: https://chromium-review.googlesource.com/314691
Reviewed-by: Randall Spangler <rspangler@chromium.org>
