arm64: dts: mediatek: mt8183: kukui: Add scp firmware-name

The upstream SCP firmware path is /lib/firmware/mediatek/mt8183/scp.img

Signed-off-by: Hsin-Yi Wang <hsinyi@chromium.org>
Reviewed-by: Chen-Yu Tsai <wenst@chromium.org>
Reviewed-by: AngeloGioacchino Del Regno <angelogioacchino.delregno@collabora.com>
Link: https://lore.kernel.org/r/20230220093343.3447381-1-hsinyi@chromium.org


Signed-off-by: Matthias Brugger <matthias.bgg@gmail.com>