yaml: move to subdirectory

A pending sdbusplus change (I38b69bc67b6a3d80cda1b508a76e106a50d8ab93)
is going to require YAML to be in a specific subdirectory and not in
the root.  Move here in prep for that change.

Signed-off-by: Patrick Williams <patrick@stwcx.xyz>
Change-Id: I42cd6599f751b34284243080dd213be3254d147c
8 files changed