2lib: Output the correct kernel_version

In the past, we mixing the meaning of sd->kernel_version in different
places.

We should separate different variables for different purposes:
1. sd->kernel_version_secdata
   * The value stored in the TPM at the end of the boot
2. sd->kernel_version
   * The value of the currently booted firmware

BUG=b:248610274, b:269204332
TEST=CQ
TEST=BOARD=cherry ./emerge_test.sh
BRANCH=none

Signed-off-by: Yi Chou <yich@google.com>
Change-Id: I9c9b23d21e8ebe99a3867eb9b983afa800bc1e6a
Reviewed-on: https://chromium-review.googlesource.com/c/chromiumos/platform/vboot_reference/+/4877902
Reviewed-by: Julius Werner <jwerner@chromium.org>
10 files changed