dt-bindings: soc: amlogic,meson-gx-hhi-sysctrl: add example covering meson-axg-hhi-sysctrl

Add a third example covering the meson-axg-hhi-sysctrl variant and more
importantly the phy subnode.
Acked-by: Conor Dooley <conor.dooley@microchip.com>
Link: https://lore.kernel.org/r/20231124-amlogic-v6-4-upstream-dsi-ccf-vim3-v9-2-95256ed139e6@linaro.orgSigned-off-by: Neil Armstrong <neil.armstrong@linaro.org>

Documentation/devicetree/bindings/soc/amlogic/amlogic,meson-gx-hhi-sysctrl.yaml

@@ -158,3 +158,36 @@ examples:
             };
         };
     };
+
+  - |
+    system-controller@ff63c000 {
+        compatible = "amlogic,meson-axg-hhi-sysctrl", "simple-mfd", "syscon";
+        reg = <0xff63c000 0x400>;
+
+        clock-controller {
+            compatible = "amlogic,axg-clkc";
+            #clock-cells = <1>;
+            clocks = <&xtal>;
+            clock-names = "xtal";
+        };
+
+        power-controller {
+           compatible = "amlogic,meson-axg-pwrc";
+           #power-domain-cells = <1>;
+           amlogic,ao-sysctrl = <&sysctrl_AO>;
+
+           resets = <&reset_viu>,
+                    <&reset_venc>,
+                    <&reset_vcbus>,
+                    <&reset_vencl>,
+                    <&reset_vid_lock>;
+           reset-names = "viu", "venc", "vcbus", "vencl", "vid_lock";
+           clocks = <&clk_vpu>, <&clk_vapb>;
+           clock-names = "vpu", "vapb";
+        };
+
+        phy {
+           compatible = "amlogic,axg-mipi-pcie-analog-phy";
+           #phy-cells = <0>;
+        };
+    };