refactor(errata_abi): add Cortex-X925 and update Cortex-X4

Update errate list for Cortex-X4 and add Cortex-X925
erratum list and support.

Signed-off-by: Govindraj Raja <govindraj.raja@arm.com>
Change-Id: Ib4e3324e7289d8e400e9a7f90e384d36cdd8bbcb
1 file changed