dt-bindings: arm: pmu: Document Denver and Carmel PMUs

Add compatible strings for the NVIDIA Denver and Carmel PMUs.
Signed-off-by: Thierry Reding <treding@nvidia.com>
Link: https://lore.kernel.org/r/20211207150746.444478-1-thierry.reding@gmail.comSigned-off-by: Rob Herring <robh@kernel.org>

Documentation/devicetree/bindings/arm/pmu.yaml

@@ -54,6 +54,8 @@ properties:
           - arm,neoverse-v1-pmu
           - brcm,vulcan-pmu
           - cavium,thunder-pmu
+          - nvidia,denver-pmu
+          - nvidia,carmel-pmu
           - qcom,krait-pmu
           - qcom,scorpion-pmu
           - qcom,scorpion-mp-pmu