vendorcode/amd/pi/00670F00: Get rid of filecodes, replace filecode.h

coreboot doesn't need AGESA's version of Filecode.h.  Some of the files
that have been copied from AGESA include the header, so we can't get rid
of it completely yet.
- Remove includes from files that weren't copied from the AGESA source.
- Remove FILECODE definitions from coreboot source.

BUG=B:69220826
TEST=Build Gardenia; Build & boot Kahlee.

Change-Id: If16feafc12dedeb90363826b62ea7513e54277f4
Signed-off-by: Martin Roth <martinroth@google.com>
Reviewed-on: https://review.coreboot.org/22438
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Aaron Durbin <adurbin@chromium.org>
Reviewed-by: Marshall Dawson <marshalldawson3rd@gmail.com>
4 files changed