dt-bindings: arm: pmu: Add Cortex A520, A715, A720, X3, and X4

Add compatible strings for the Arm Cortex-A520, Cortex-A715,
Cortex-A720, Cortex-X3, and Cortex-X4 CPU PMUs.

Acked-by: Conor Dooley <conor.dooley@microchip.com>
Signed-off-by: Rob Herring <robh@kernel.org>
Link: https://lore.kernel.org/r/20230706205505.308523-1-robh@kernel.org
Signed-off-by: Will Deacon <will@kernel.org>

Documentation/devicetree/bindings/arm/pmu.yaml

@@ -49,9 +49,14 @@ properties:
           - arm,cortex-a77-pmu
           - arm,cortex-a78-pmu
           - arm,cortex-a510-pmu
+          - arm,cortex-a520-pmu
           - arm,cortex-a710-pmu
+          - arm,cortex-a715-pmu
+          - arm,cortex-a720-pmu
           - arm,cortex-x1-pmu
           - arm,cortex-x2-pmu
+          - arm,cortex-x3-pmu
+          - arm,cortex-x4-pmu
           - arm,neoverse-e1-pmu
           - arm,neoverse-n1-pmu
           - arm,neoverse-n2-pmu