ppp no longer provides the duplicate if_pppox.h header so no need to patch that
out of the Makefile.
(From OE-Core rev: 015574ac9335799e0a3da00cf882b103177c3744)
Signed-off-by: Jussi Kukkonen <jussi.kukkonen@intel.com>
Signed-off-by: Ross Burton <ross.burton@intel.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>