AGESA: Drop offset on PCI device enumeration

Integrated PCI devices in southbridge silicon have static BDFs,
no need to have variables to store the parent bus or an offset
with constant zero.

Change-Id: I37d3794d36b5e5775da9215574ddc199696646d0
Signed-off-by: Kyösti Mälkki <kyosti.malkki@gmail.com>
Reviewed-on: http://review.coreboot.org/6333
Tested-by: build bot (Jenkins)
Reviewed-by: Paul Menzel <paulepanter@users.sourceforge.net>
Reviewed-by: Patrick Georgi <patrick@georgi-clan.de>
44 files changed