PCI: mediatek-gen3: Rely on clk_bulk_prepare_enable() in mtk_pcie_en7581_power_up()

PCI: mediatek-gen3: Rely on clk_bulk_prepare_enable() in mtk_pcie_en7581_power_up()

Replace clk_bulk_prepare() and clk_bulk_enable() with
clk_bulk_prepare_enable() in mtk_pcie_en7581_power_up() routine.

Link: https://lore.kernel.org/r/20250108-pcie-en7581-fixes-v6-1-21ac939a3b9b@kernel.org
Signed-off-by: Lorenzo Bianconi <lorenzo@kernel.org>
Signed-off-by: Krzysztof Wilczyński <kwilczynski@kernel.org>
Reviewed-by: AngeloGioacchino Del Regno <angelogioacchino.delregno@collabora.com>
Reviewed-by: Manivannan Sadhasivam <manivannan.sadhasivam@linaro.org>