PCI: mediatek-gen3: Move reset/assert callbacks in .power_up()

JIRA: https://issues.redhat.com/browse/RHEL-83611
Upstream Status: e4c7dfd953f7618f0ccb70d87c1629634f306fab

commit e4c7dfd953f7618f0ccb70d87c1629634f306fab
Author: Lorenzo Bianconi <lorenzo@kernel.org>
Date:   Wed Jan 8 10:50:41 2025 +0100

    PCI: mediatek-gen3: Move reset/assert callbacks in .power_up()

    In order to make the code more readable, the reset_control_bulk_assert()
    function for PHY reset lines is moved to make it pair with
    reset_control_bulk_deassert() in mtk_pcie_power_up() and
    mtk_pcie_en7581_power_up(). The same change is done for
    reset_control_assert() used to assert MAC reset line.

    Introduce PCIE_MTK_RESET_TIME_US macro for the time needed to
    complete PCIe reset on MediaTek controller.

    Link: https://lore.kernel.org/r/20250108-pcie-en7581-fixes-v6-2-21ac939a3b9b@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>

Signed-off-by: Myron Stowe <mstowe@redhat.com>