chore: rename hayes to a520

Rename Cortex-hayes to Cortes-A520

Change-Id: Ic574b55b1aaf11b5bf7b583e244245e7b54bdb22
Signed-off-by: Govindraj Raja <govindraj.raja@arm.com>
(cherry picked from commit dea3d71e9a6685e29bd6cad4464dfe55ce9fb66a)
7 files changed