vboot: Append periods to function descriptions in 2api.h
vboot: Append periods to function descriptions in 2api.h

BRANCH=none
BUG=none
TEST=FEATURES=test emerge-nami vboot_reference

Change-Id: Id02f4a20a95c3653c4327b9cd7620b24bafb50a0
Signed-off-by: Yu-Ping Wu <e17b963d2ce5bddd1fecae25c320252b132e804d@chromium.org>
Reviewed-on: https://chromium-review.googlesource.com/c/chromiumos/platform/vboot_reference/+/1957999
Reviewed-by: Joel Kitching <c2feea8c1334a0d339e816ae4c7c9ecfa9b30a91@chromium.org>

coreboot/vboot,coreboot/vboot,coreboot/vboot,coreboot/vboot,coreboot/vboot