ASoC: dt-bindings: microchip: use proper naming syntax

Use the following syntax for Microchip ASoC YAML files:
vendor,device.yaml

Signed-off-by: Claudiu Beznea <claudiu.beznea@microchip.com>
Acked-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
Link: https://lore.kernel.org/r/20221213112851.89212-2-claudiu.beznea@microchip.com


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