soc: mediatek: pm-domains: Remove unused macro

Due to clk resource data will be allocated dynamically by
searching parent count of clk in power domain node, so remove
the unused marco MAX_SUBSYS_CLKS for static allocation.

Signed-off-by: Chun-Jie Chen <chun-jie.chen@mediatek.com>
Reviewed-by: Enric Balletbo i Serra <enric.balletbo@collabora.com>
Reviewed-by: AngeloGioacchino Del Regno <angelogioacchino.delregno@collabora.com>
Link: https://lore.kernel.org/r/20220130012104.5292-4-chun-jie.chen@mediatek.com


Signed-off-by: Matthias Brugger <matthias.bgg@gmail.com>