ASoC: dt-bindings: realtek,rt5682s: Add #sound-dai-cells

The rt5682s codec is a DAI provider with two interfaces - AIF1 and AIF2
- and therefore should have a #sound-dai-cells property that is equal to
1. Add it.

Acked-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
Signed-off-by: Nícolas F. R. A. Prado <nfraprado@collabora.com>
Reviewed-by: Chen-Yu Tsai <wenst@chromium.org>
Reviewed-by: AngeloGioacchino Del Regno <angelogioacchino.delregno@collabora.com>
Link: https://lore.kernel.org/r/20221024220015.1759428-2-nfraprado@collabora.com


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