ASoC: dt-bindings: mediatek,mt8188-mt6359: Add compatible for mt8390 evk

Add a compatible for the MT8390 EVK. It is compatible with
mediatek,mt8188-mt6359-evb so make that the fallback compatible.

Signed-off-by: Nícolas F. R. A. Prado <nfraprado@collabora.com>
Reviewed-by: AngeloGioacchino Del Regno <angelogioacchino.delregno@collabora.com>
Link: https://patch.msgid.link/20241205-genio700-audio-output-v1-2-0e955c78c29e@collabora.com


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