There are more Allwinner SoCs that do not have a SCP now. When there's no SCP_ADDR macro defined, we can assume there's no SCP available. Drop the scp part of FIT description when SCP_ADDR does not exist. Signed-off-by: Icenowy Zheng <icenowy@sipeed.com> Reviewed-by: Andre Przywara <andre.przywara@arm.com> Signed-off-by: Andre Przywara <andre.przywara@arm.com>