[PATCH v2 22/23] clk: mediatek: clk-mt7986-topckgen: Properly keep some clocks enabled

[Miles Chen]

> Instead of calling clk_prepare_enable() on a bunch of clocks at probe
> time, set the CLK_IS_CRITICAL flag to the same as these are required
> to be always on, and this is the right way of achieving that.
> 
> Signed-off-by: AngeloGioacchino Del Regno <angelogioacchino.delregno at collabora.com>

Reviewed-by: Miles Chen <miles.chen at mediatek.com>