clk: mediatek: Add MT8188 vppsys0 clock support

clk: mediatek: Add MT8188 vppsys0 clock support

Add MT8188 vppsys0 clock controller which provides clock gate
controller for Video Processor Pipe.

Signed-off-by: Garmin.Chang <Garmin.Chang@mediatek.com>
Reviewed-by: Matthias Brugger <matthias.bgg@gmail.com>
Reviewed-by: Chen-Yu Tsai <wenst@chromium.org>
Reviewed-by: AngeloGioacchino Del Regno <angelogioacchino.delregno@collabora.com>
Link: https://lore.kernel.org/r/20230331123621.16167-16-Garmin.Chang@mediatek.com
Signed-off-by: Stephen Boyd <sboyd@kernel.org>