refactor(cpus): declare runtime errata correctly

There errata don't have a workaround in the cpu file. So calling the
wrappers is redundant. We can simply register them with the framework.

Change-Id: I316daeee603e86c9f2bdccf91e1b10f7ec6c3f9d
Signed-off-by: Boyan Karatotev <boyan.karatotev@arm.com>
2 files changed