clk: mediatek: mt8173: Break down clock drivers and allow module build

clk: mediatek: mt8173: Break down clock drivers and allow module build

Split the giant clock driver for MT8173 into smaller drivers and
make it possible to build the non boot critical clock controller
drivers as modules by adding remove functions and both module
description and license where needed.
While at it, also change a mtk_register_reset_controller() call
to mtk_register_reset_controller_with_dev() in mt8173-infracfg.

Some spare code style cleanups were also performed.

Signed-off-by: AngeloGioacchino Del Regno <angelogioacchino.delregno@collabora.com>
Link: https://lore.kernel.org/r/20230120092053.182923-11-angelogioacchino.delregno@collabora.com
Tested-by: Mingming Su <mingming.su@mediatek.com>
Signed-off-by: Stephen Boyd <sboyd@kernel.org>