Merge branch 'pci/controller/mediatek'

- Use clk_bulk_prepare_enable() instead of separate clk_bulk_prepare() and
  clk_bulk_enable() (Lorenzo Bianconi)

- Rearrange reset assert/deassert so they're both done in the *_power_up()
  callbacks (Lorenzo Bianconi)

- Document that Airoha EN7581 requires PHY init and power-on before PHY
  reset deassert, unlike other MediaTek Gen3 controllers (Lorenzo Bianconi)

- Move Airoha EN7581 post-reset delay from the en7581 clock .enable()
  method to mtk_pcie_en7581_power_up() (Lorenzo Bianconi)

- Sleep instead of delay during Airoha EN7581 power-up, since this is a
  non-atomic context (Lorenzo Bianconi)

- Skip PERST# assertion on Airoha EN7581 during probe and suspend/resume to
  avoid a hardware defect (Lorenzo Bianconi)

- Enable async probe to reduce system startup time (Douglas Anderson)

* pci/controller/mediatek:
  PCI: mediatek-gen3: Enable async probe by default
  PCI: mediatek-gen3: Avoid PCIe resetting via PERST# for Airoha EN7581 SoC
  PCI: mediatek-gen3: Rely on msleep() in mtk_pcie_en7581_power_up()
  PCI: mediatek-gen3: Move reset delay in mtk_pcie_en7581_power_up()
  PCI: mediatek-gen3: Add comment about initialization order in mtk_pcie_en7581_power_up()
  PCI: mediatek-gen3: Move reset/assert callbacks in .power_up()
  PCI: mediatek-gen3: Rely on clk_bulk_prepare_enable() in mtk_pcie_en7581_power_up()