fix(cpus): update the rev-var for Cortex-A78AE

Update the revision and variant information in the
cortex_a78_ae.s and errata ABI file for erratum ID - 2376748
based on the latest SDEN.

SDEN documentation:
https://developer.arm.com/documentation/SDEN-1707912/latest

Change-Id: I082aac41adf717b0d5d59046a8933a3f5a3de94f
Signed-off-by: Sona Mathew <sonarebecca.mathew@arm.com>
4 files changed