dt-bindings: iio: Fix incorrect compatible strings in examples

Fix a couple of examples using incorrect compatible strings.

Signed-off-by: Rob Herring <robh@kernel.org>
Reviewed-by: Slawomir Stepien <sst@poczta.fm>
Reviewed-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
Link: https://lore.kernel.org/r/20220422192039.2590548-1-robh@kernel.org


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