arm64: cputype: Add Cortex-A720AE definitions

Add cputype definitions for Cortex-A720AE. These will be used for errata
detection in subsequent patches.

These values can be found in the Cortex-A720AE TRM:

https://developer.arm.com/documentation/102828/0001/



... in Table A-187

Signed-off-by: Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>
Signed-off-by: Will Deacon <will@kernel.org>