[PATCH 07/10] clk: mediatek: clk-mt8195-topckgen: Add GPU clock mux notifier

[Miles Chen]

> Following the changes done to MT8183, register a similar notifier
> for MT8195 as well, allowing safe clockrate updates for the MFGPLL.
> 
> Signed-off-by: AngeloGioacchino Del Regno <angelogioacchino.delregno at collabora.com>

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