vboot: remove some trailing spaces

BUG=b:124141368
TEST=none
BRANCH=none

Change-Id: I054e668d96e1c76d6ce464e182fd05d17ef3fca0
Signed-off-by: Joel Kitching <kitching@google.com>
Reviewed-on: https://chromium-review.googlesource.com/c/chromiumos/platform/vboot_reference/+/2154342
Reviewed-by: Joel Kitching <kitching@chromium.org>
Reviewed-by: Yu-Ping Wu <yupingso@chromium.org>
Commit-Queue: Joel Kitching <kitching@chromium.org>
Tested-by: Joel Kitching <kitching@chromium.org>
3 files changed