buffet: Move privet options and state into buffet

Now it's a single binary and don't deserve separate configs and states.

BUG=brillo:1211,brillo:1212
CQ-DEPEND=CL:281024
TEST=`FEATURES=test emerge-gizmo buffet`

Change-Id: I5886d3092b8ccba57be5f2f6edf7ddbc36fd199b
Reviewed-on: https://chromium-review.googlesource.com/281018
Reviewed-by: Vitaly Buka <vitalybuka@chromium.org>
Tested-by: Vitaly Buka <vitalybuka@chromium.org>
Commit-Queue: Vitaly Buka <vitalybuka@chromium.org>
15 files changed
tree: 0db01d9ad2fe18438e954861c6bc5fcd84bfdafc
  1. buffet/