dt-bindings: iio/adc: qcom,spmi-vadc: clean up examples

Clean up the VADC examples by dropping a comment, dropping unnecessary
labels and adding newline separators.

Signed-off-by: Johan Hovold <[e-mail]>
Acked-by: Conor Dooley <[e-mail]>
Link: https://lore.kernel.org/r/[e-mail]
Signed-off-by: Jonathan Cameron <[e-mail]>

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

···
     pmic {
         #address-cells = <1>;
         #size-cells = <0>;
-        /* VADC node */
-        pmic_vadc: adc@3100 {
+
+        adc@3100 {
             compatible = "qcom,spmi-vadc";
             reg = <0x3100>;
             interrupts = <0x0 0x31 0x0 0x1>;
···
     pmic {
         #address-cells = <1>;
         #size-cells = <0>;
+
         adc@3100 {
             reg = <0x3100>;
             compatible = "qcom,spmi-adc7";