dt-bindings: iio/adc: qcom,spmi-iadc: Fix 'reg' property in example

The QCom SPMI PMIC child nodes are defined to have a single address cell,
but the example has an erroneous size cell. Remove it.
Signed-off-by: Rob Herring <robh@kernel.org>
Link: https://lore.kernel.org/r/20220126231217.1633935-1-robh@kernel.orgSigned-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>

Documentation/devicetree/bindings/iio/adc/qcom,spmi-iadc.yaml

@@ -51,7 +51,7 @@ examples:
         #size-cells = <0>;
         pmic_iadc: adc@3600 {
             compatible = "qcom,spmi-iadc";
-            reg = <0x3600 0x100>;
+            reg = <0x3600>;
             interrupts = <0x0 0x36 0x0 IRQ_TYPE_EDGE_RISING>;
             qcom,external-resistor-micro-ohms = <10000>;
             #io-channel-cells  = <1>;