arm64: dts: mt8183: Rename nodes to match audiosys DT schema

arm64: dts: mt8183: Rename nodes to match audiosys DT schema

The DT schema for "mediatek,mt8183-audiosys" expects an
audio-controller node inside the audiosys block. Rename
the nested AFE node from "mt8183-afe-pcm" to
"audio-controller" accordingly.

Also rename the audiosys node itself from "audio-controller" to
"clock-controller" to better reflect its function.

Reviewed-by: AngeloGioacchino Del Regno <angelogioacchino.delregno@collabora.com>
Signed-off-by: Julien Massot <julien.massot@collabora.com>
Signed-off-by: AngeloGioacchino Del Regno <angelogioacchino.delregno@collabora.com>