dt-bindings: arm: rockchip: Add rk3576 compatible string to pmu.yaml

Add the compatible for the pmu mfd on rk3576.
Signed-off-by: Detlev Casanova <detlev.casanova@collabora.com>
Reviewed-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
Link: https://lore.kernel.org/r/20240903152308.13565-3-detlev.casanova@collabora.comSigned-off-by: Heiko Stuebner <heiko@sntech.de>

Documentation/devicetree/bindings/arm/rockchip/pmu.yaml

@@ -26,6 +26,7 @@ select:
           - rockchip,rk3368-pmu
           - rockchip,rk3399-pmu
           - rockchip,rk3568-pmu
+          - rockchip,rk3576-pmu
           - rockchip,rk3588-pmu
           - rockchip,rv1126-pmu
 
@@ -43,6 +44,7 @@ properties:
           - rockchip,rk3368-pmu
           - rockchip,rk3399-pmu
           - rockchip,rk3568-pmu
+          - rockchip,rk3576-pmu
           - rockchip,rk3588-pmu
           - rockchip,rv1126-pmu
       - const: syscon