ASoC: dt-bindings: use "soundwire" as controller's node name in examples

Soundwire Devicetree bindings expect the Soundwire controller device
node to be named just "soundwire".  Correct examples, so the incorrect
code will not be re-used.

Reported-by: Neil Armstrong <neil.armstrong@linaro.org>
Signed-off-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
Link: https://lore.kernel.org/r/20231107101610.13728-1-krzysztof.kozlowski@linaro.org


Signed-off-by: Mark Brown <broonie@kernel.org>