arm64: dts: mediatek: cherry: Enable secondary SD/MMC controller

As of now, all of the boards based on the cherry platform have a
usable secondary SD/MMC controller, usually for SD cards: enable
it to allow both booting from it and generally accessing external
storage.

Signed-off-by: AngeloGioacchino Del Regno <angelogioacchino.delregno@collabora.com>
Link: https://lore.kernel.org/r/20220902081156.38526-6-angelogioacchino.delregno@collabora.com


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