Revert workaround for A76 erratum 1800710

This errata workaround did not work as intended and was revised in
subsequent SDEN releases so we are reverting this change.

This is the patch being reverted:
https://review.trustedfirmware.org/c/TF-A/trusted-firmware-a/+/4684

Signed-off-by: John Powell <john.powell@arm.com>
Change-Id: I560749a5b55e22fbe49d3f428a8b9545d6bdaaf0
4 files changed