AGESA vendorcode: Auto include-dirs

AGESA internal headerfiles are allover the place. Luckily, they
have unique names within the Proc/ tree so include every existing
directory in undefined order.

Change-Id: I86f080e514391a3f0f05d379d24d490ce075060e
Signed-off-by: Kyösti Mälkki <kyosti.malkki@gmail.com>
Reviewed-on: https://review.coreboot.org/21285
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Aaron Durbin <adurbin@chromium.org>
Reviewed-by: Philippe Mathieu-Daudé <f4bug@amsat.org>
Reviewed-by: Marshall Dawson <marshalldawson3rd@gmail.com>
5 files changed