dt-bindings: iio/adc: qcom,spmi-vadc: fix example node names

The VADC is a child of an SPMI PMIC, which in turn sits on an SPMI bus.

Fixes: 74e90346 ("dt-bindings: iio: adc: qcom,spmi-vadc: extend example")
Fixes: 5a471662 ("iio: adc: Convert the QCOM SPMI ADC bindings to .yaml format")
Signed-off-by: Johan Hovold <johan+linaro@kernel.org>
Acked-by: Conor Dooley <conor.dooley@microchip.com>
Link: https://lore.kernel.org/r/20231130171628.12257-6-johan+linaro@kernel.org


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