dt-bindings: pinctrl: qcom,pmic-mpp: clean up example

The Multi-Purpose Pin controller block is part of an SPMI PMIC (which in
turns sits on an SPMI bus) and uses a single value for the register
property that corresponds to its base address.

Clean up the example by adding a parent PMIC node with proper
'#address-cells' and '#size-cells' properties, dropping the incorrect
second register value, adding some newline separators and increasing the
indentation to four spaces.
Signed-off-by: Johan Hovold <johan+linaro@kernel.org>
Reviewed-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
Link: https://lore.kernel.org/r/20231130172834.12653-1-johan+linaro@kernel.orgSigned-off-by: Linus Walleij <linus.walleij@linaro.org>

Documentation/devicetree/bindings/pinctrl/qcom,pmic-mpp.yaml

@@ -158,9 +158,14 @@ examples:
   - |
     #include <dt-bindings/pinctrl/qcom,pmic-mpp.h>
 
+    pmic {
+        #address-cells = <1>;
+        #size-cells = <0>;
+
         pm8841_mpp: mpps@a000 {
             compatible = "qcom,pm8841-mpp", "qcom,spmi-mpp";
-      reg = <0xa000 0>;
+            reg = <0xa000>;
+
             gpio-controller;
             #gpio-cells = <2>;
             gpio-ranges = <&pm8841_mpp 0 0 4>;
@@ -188,4 +193,5 @@ examples:
                 };
             };
         };
+    };
 ...