arm64: dts: mediatek: mt8516: add i2c clock-div property

Move the clock-div property from the pumpkin board dtsi to the SoC's
since it belongs to the SoC itself and is required on other devices.

Fixes: 5236347b ("arm64: dts: mediatek: add dtsi for MT8516")
Signed-off-by: Val Packett <val@packett.cool>
Reviewed-by: AngeloGioacchino Del Regno <angelogioacchino.delregno@collabora.com>
Link: https://lore.kernel.org/r/20241204190524.21862-4-val@packett.cool


Signed-off-by: AngeloGioacchino Del Regno <angelogioacchino.delregno@collabora.com>