AMD AGESA boards: Prevent passing duplicate obj names to ar

For some of the boards using AMD processors, the Agesa Makefile.inc
is processed twice, causing the list of obj files passed to the ar
command to be added twice. This does not break the build, but does
make the ar command line unnecessarily long.

Change-Id: I02a7e6fc617e337ca2e2dceeff3d4db9995bfe16
Signed-off-by: Scott Duplichan <scott@notabs.org>
Reviewed-on: http://review.coreboot.org/7787
Reviewed-by: Edward O'Callaghan <eocallaghan@alterapraxis.com>
Tested-by: build bot (Jenkins)
Reviewed-by: Paul Menzel <paulepanter@users.sourceforge.net>
3 files changed