dt-bindings: iio/adc: qcom,spmi-iadc: fix example node name

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

Fixes: a4e6bf69 ("dt-bindings:iio:adc:qcom,spmi-iadc: txt to yaml format conversion.")
Signed-off-by: Johan Hovold <johan+linaro@kernel.org>
Acked-by: Conor Dooley <conor.dooley@microchip.com>
Link: https://lore.kernel.org/r/20231130171628.12257-3-johan+linaro@kernel.org


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