refactor(errata-abi): move EXTRACT_PARTNUM to arch.h

This patch moves EXTRACT_PARTNUM from errata abi includes
to arch.h which is part of common includes

Change-Id: Id8bbaf21566f3145a75cfa0dafec6823ed2df3a9
Signed-off-by: Arvind Ram Prakash <arvind.ramprakash@arm.com>
2 files changed