fix(security): add CVE-2025-0647 for Cortex-X2

This patch mitigates CVE-2025-0647 for Cortex-X2 CPU.

Arm Security Bulletin Document:
https://developer.arm.com/documentation/111546

Change-Id: Idba607340d944a6387759c856e8eacc967e0ec06
Signed-off-by: John Powell <john.powell@arm.com>
Signed-off-by: Govindraj Raja <govindraj.raja@arm.com>