Move final Intel chipsets with ME to intel/common/firmware

This switches the final 4 Intel platforms that use ME firmware from
using code specific to the platform to the common IFD Kconfig and
Makefile.

braswell, broadwell, bd82x6x (cougar point & panther point) and ibexpeak

Change-Id: Id3bec6dbe2e1a8a90f51d9378150dbb44258b596
Signed-off-by: Martin Roth <gaumless@gmail.com>
Reviewed-on: http://review.coreboot.org/10876
Tested-by: build bot (Jenkins)
Reviewed-by: Patrick Georgi <pgeorgi@google.com>
Reviewed-by: Stefan Reinauer <stefan.reinauer@coreboot.org>
Reviewed-by: Paul Menzel <paulepanter@users.sourceforge.net>
8 files changed