Revert "Revert "Revert "Add PPPOE related files""" WITHOUT STOW-AWAYS

This reverts commit 49362fbce25844c1547f3aa5f7a4f1fdf2cd74cb...
and its childrens' childrens' children.

Change-Id: Ib41575396c71a6b335c5f63d5ee06565cc493ecf
Signed-off-by: nuclearmistake <nuclearmistake@gmail.com>