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

Clean up the RRADC example by 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/20231130171628.12257-5-johan+linaro@kernel.orgSigned-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>

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

@@ -43,9 +43,9 @@ examples:
         #address-cells = <1>;
         #size-cells = <0>;
 
-        pmic_rradc: adc@4500 {
+        adc@4500 {
             compatible = "qcom,pmi8998-rradc";
             reg = <0x4500>;
-            #io-channel-cells  = <1>;
+            #io-channel-cells = <1>;
         };
     };