clk: mediatek: Change PLL register API for MT8186

Use mtk_clk_register_pllfhs() to enhance frequency hopping and
spread spectrum clocking control for MT8186.

Co-developed-by: Edward-JW Yang <edward-jw.yang@mediatek.com>
Signed-off-by: Edward-JW Yang <edward-jw.yang@mediatek.com>
Signed-off-by: Johnson Wang <johnson.wang@mediatek.com>
Reviewed-by: AngeloGioacchino Del Regno <angelogioacchino.delregno@collabora.com>
Link: https://lore.kernel.org/r/20221121122957.21611-5-johnson.wang@mediatek.com


Signed-off-by: Chen-Yu Tsai <wenst@chromium.org>