vboot: Add vb2api_secdata_fwmp_create()

This commit adds a method to create an empty Firmware Management
Parameters (FWMP) object in secure storage context.  This can be used
to initialize the FWMP space just after it's been created by

TEST=With other changes in coreboot to create and write the FWMP
space, `emerge-keeby coreboot`.

Signed-off-by: Aseda Aboagye <aaboagye@google.com>
Change-Id: I614975609a44ec18ff018970056e6e45e68265ed
Reviewed-on: https://chromium-review.googlesource.com/c/chromiumos/platform/vboot_reference/+/2875533
Tested-by: Aseda Aboagye <aaboagye@chromium.org>
Auto-Submit: Aseda Aboagye <aaboagye@chromium.org>
Reviewed-by: Julius Werner <jwerner@chromium.org>
Commit-Queue: Aseda Aboagye <aaboagye@chromium.org>
2 files changed