dt-bindings: ARM: Mediatek: Remove msdc binding of MT8192 clock

The code controlling msdc clock gate was moved inthe the consumer, the MMC
driver. This node did never represent a working implementation of any
peripheral. It was just a lonely clock gate that wasn't used. Delete the
binding description of this node.

Signed-off-by: Matthias Brugger <matthias.bgg@gmail.com>
Reviewed-by: AngeloGioacchino Del Regno <angelogioacchino.delregno@collabora.com>
Reviewed-by: Miles Chen <miles.chen@mediatek.com>
Link: https://lore.kernel.org/r/20220523102339.21927-2-matthias.bgg@kernel.org


Acked-by: Rob Herring <robh@kernel.org>
Reviewed-by: Chen-Yu Tsai <wenst@chromium.org>
Signed-off-by: Stephen Boyd <sboyd@kernel.org>