dt-bindings: arm/cpus: Add missing Applied Micro CPU compatibles

"apm,potenza" and "apm,strega" CPU compatibles have been in use for some
time.

Link: https://lore.kernel.org/r/20250812181428.69490-1-robh@kernel.org
Signed-off-by: Rob Herring (Arm) <robh@kernel.org>

Documentation/devicetree/bindings/arm/cpus.yaml

@@ -80,6 +80,8 @@ properties:
 
   compatible:
     enum:
+      - apm,potenza
+      - apm,strega
       - apple,avalanche
       - apple,blizzard
       - apple,cyclone