dt-bindings: iio/adc: qcom,spmi-iadc: clean up example

Clean up the IADC example by adding a newline separator, dropping an
unnecessary label and removing stray white space.
Signed-off-by: Johan Hovold <johan+linaro@kernel.org>
Acked-by: Conor Dooley <conor.dooley@microchip.com>
Link: https://lore.kernel.org/r/20231130171628.12257-4-johan+linaro@kernel.orgSigned-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>

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

@@ -54,12 +54,13 @@ examples:
     pmic {
         #address-cells = <1>;
         #size-cells = <0>;
-        pmic_iadc: adc@3600 {
+
+        adc@3600 {
             compatible = "qcom,pm8941-iadc", "qcom,spmi-iadc";
             reg = <0x3600>;
             interrupts = <0x0 0x36 0x0 IRQ_TYPE_EDGE_RISING>;
             qcom,external-resistor-micro-ohms = <10000>;
-            #io-channel-cells  = <1>;
+            #io-channel-cells = <1>;
         };
     };
 ...