dt-bindings: gpio: fix starfive,jh7100-gpio bindings example

In the example, drop surrounding "soc" node and #{address,size}-cells.
By convention, all examples on MMIO bus use #{address,size}-cells = <1>.

Suggested-by: Geert Uytterhoeven <geert@linux-m68k.org>
Signed-off-by: Drew Fustini <drew@beagleboard.org>

Documentation/devicetree/bindings/gpio/starfive,jh7100-gpio.yaml

@@ -47,19 +47,14 @@ additionalProperties: false
 
 examples:
   - |
-      soc {
-        #address-cells = <2>;
-        #size-cells = <2>;
-
-        gpio@11910000 {
-          compatible = "starfive,jh7100-gpio";
-          reg = <0x0 0x11910000 0x0 0x10000>;
-          gpio-controller;
-          #gpio-cells = <2>;
-          interrupt-controller;
-          #interrupt-cells = <2>;
-          interrupts = <32>;
-        };
+      gpio@11910000 {
+        compatible = "starfive,jh7100-gpio";
+        reg = <0x11910000 0x10000>;
+        gpio-controller;
+        #gpio-cells = <2>;
+        interrupt-controller;
+        #interrupt-cells = <2>;
+        interrupts = <32>;
       };
 
 ...