dt-bindings: arm: cpus: add cortex-a78ae compatible

Cortex A78AE's MPIDR has been added since
commit 83bea32a ("arm64: Add part number for Arm Cortex-A78AE")
We also need to add the compatible.
Signed-off-by: Chanho Park <chanho61.park@samsung.com>
Signed-off-by: Rob Herring <robh@kernel.org>
Link: https://lore.kernel.org/r/20220707082753.28862-1-chanho61.park@samsung.com

Documentation/devicetree/bindings/arm/cpus.yaml

@@ -138,6 +138,7 @@ properties:
       - arm,cortex-a76
       - arm,cortex-a77
       - arm,cortex-a78
+      - arm,cortex-a78ae
       - arm,cortex-a510
       - arm,cortex-a710
       - arm,cortex-m0