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 <johan+linaro@kernel.org>
Acked-by: Conor Dooley <conor.dooley@microchip.com>
Link: https://lore.kernel.org/r/20231130171628.12257-7-johan+linaro@kernel.org


Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>