dt-bindings: pinctrl: brcm,ns-pinmux: drop unneeded CRU from example

There is no need to include CRU in example of this binding. It wasn't
complete / correct anyway. The proper binding can be find in the
mfd/brcm,cru.yaml .

Signed-off-by: Rafał Miłecki <rafal@milecki.pl>
Reviewed-by: Rob Herring <robh@kernel.org>
Link: https://lore.kernel.org/r/20211008205938.29925-2-zajec5@gmail.com
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>

Documentation/devicetree/bindings/pinctrl/brcm,ns-pinmux.yaml

@@ -77,21 +77,13 @@ additionalProperties: false
 
 examples:
   - |
-    cru@1800c100 {
-        compatible = "simple-bus";
-        reg = <0x1800c100 0x1a4>;
-        ranges;
-        #address-cells = <1>;
-        #size-cells = <1>;
+    pin-controller@1800c1c0 {
+        compatible = "brcm,bcm4708-pinmux";
+        reg = <0x1800c1c0 0x24>;
+        reg-names = "cru_gpio_control";
 
-        pin-controller@1c0 {
-            compatible = "brcm,bcm4708-pinmux";
-            reg = <0x1c0 0x24>;
-            reg-names = "cru_gpio_control";
-
-            spi-pins {
-                function = "spi";
-                groups = "spi_grp";
-            };
+        spi-pins {
+            function = "spi";
+            groups = "spi_grp";
         };
     };