this is based on lbmk commit e5af201060e
this removes more code that is not needed in cbmk's version
of inject.sh
lbmk and cbmk inject.sh are now much more in sync, in that
they are much more similar to each other than before.
the cbmk version only handles MAC addresses, and does not
do vendor file downloading or patching.
Signed-off-by: Leah Rowe <leah@libreboot.org>