clk: mediatek: Allow all MT8167 clocks to be built as modules

Almost all MT8167 clocks have been converted to use the common probe
mechanism, moreover, now all of them are platform drivers: allow
building as modules.

Signed-off-by: AngeloGioacchino Del Regno <angelogioacchino.delregno@collabora.com>
Reviewed-by: Chen-Yu Tsai <wenst@chromium.org>
Link: https://lore.kernel.org/r/20230306140543.1813621-43-angelogioacchino.delregno@collabora.com


Signed-off-by: Stephen Boyd <sboyd@kernel.org>