Port to recent reference board (AMD Persimmon) changes in commits:
c93a75a
AMD/CIMx: Add functions for AMD PCI IRQ routing
Change-Id: I307709bfee554bc64788a973da6d9313ca7c0de2
Signed-off-by: Edward O'Callaghan <eocallaghan@alterapraxis.com>
Reviewed-on: http://review.coreboot.org/5882
Tested-by: build bot (Jenkins)
Reviewed-by: Mike Loptien <mike.loptien@se-eng.com>