arm64: dts: mt8195: Add panfrost node for Mali-G57 Valhall Natt GPU

arm64: dts: mt8195: Add panfrost node for Mali-G57 Valhall Natt GPU

Add GPU support through panfrost for the Mali-G57 GPU on MT8195
with its OPP table but keep it in disabled state.

This is expected to be enabled only on boards which make use of
the GPU.

Signed-off-by: AngeloGioacchino Del Regno <angelogioacchino.delregno@collabora.com>
Reviewed-by: Chen-Yu Tsai <wenst@chromium.org>
Tested-by: Chen-Yu Tsai <wenst@chromium.org>
Link: https://lore.kernel.org/r/20230301095523.428461-16-angelogioacchino.delregno@collabora.com
Signed-off-by: Matthias Brugger <matthias.bgg@gmail.com>