bd06717863
Ref:https://bugzilla.tianocore.org/show_bug.cgi?id=4000 Change flow to bus scan all root bridge instances even when any one root bridge meet bus resource OUT_OF_RESOURCE case. thus platform handler of "EfiPciHostBridgeEndBusAllocation" has an chance to do relative pci bus rebalance to handle this case. Signed-off-by: Foster Nong <foster.nong@intel.com> Reviewed-by: Ray Ni <ray.ni@intel.com>