clk: mediatek: Delete MT8192 msdc gate

The msdc gate is part of the MMC driver. Delete the not used code.

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/20220523102339.21927-3-matthias.bgg@kernel.org


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