Toggle on in devicetree.cb and build into AGESA by buildOpts.c. Add ACPI and MPTABLES interrupt routers for IOMMU also. Change-Id: Ia838f9b70f09ed1180daeb5382edc08c4b74946c Signed-off-by: Edward O'Callaghan <eocallaghan@alterapraxis.com> Reviewed-on: http://review.coreboot.org/7643 Tested-by: build bot (Jenkins) Reviewed-by: Alexandru Gagniuc <mr.nuke.me@gmail.com>