arm64: dts: mediatek: mt8390-genio-common: Add routes for DMIC

arm64: dts: mediatek: mt8390-genio-common: Add routes for DMIC

Add necessary routes for the onboard dual DMIC present on the Genio
700/510 EVK. The dmic is supplied by micbias0 and micbias2, and inputs
into the MT8188 DMIC DAI.

Co-developed-by: parkeryang <Parker.Yang@mediatek.com>
Signed-off-by: parkeryang <Parker.Yang@mediatek.com>
Reviewed-by: AngeloGioacchino Del Regno <angelogioacchino.delregno@collabora.com>
Signed-off-by: Nícolas F. R. A. Prado <nfraprado@collabora.com>
Link: https://lore.kernel.org/r/20250225-genio700-dmic-v2-6-3076f5b50ef7@collabora.com
Signed-off-by: AngeloGioacchino Del Regno <angelogioacchino.delregno@collabora.com>