Add support for R8A78000 (R-Car X5H) PCIe4.

This driver previously supported R-Car Gen4 S4/V4H/V4M. PCIe features
of R-Car X5H PCIe4 are almost all the same, except for different PHY
which has its own driver, slightly different initialization code and
the DMA is no longer eDMA but HDMA.

Endpoint mode is currently not implemented for R-Car Gen5 PCIe4.

Marek Vasut (5):
  dt-bindings: PCI: rcar-gen4-pci-host: Add R-Car X5H PCIe4 compatible
  PCI: dwc: rcar-gen4: Rework rcar_gen4_pcie_drvdata
    .additional_common_init into .init
  PCI: dwc: rcar-gen4: Split .start_link into ltssm_control and
    speed_control
  PCI: dwc: rcar-gen4: Handle PERST via reset subsystem
  PCI: dwc: rcar-gen4: Add support for R-Car X5H PCIe4

 .../bindings/pci/rcar-gen4-pci-host.yaml      |  74 ++++--
 drivers/pci/controller/dwc/pcie-rcar-gen4.c   | 237 +++++++++++++++---
 2 files changed, 252 insertions(+), 59 deletions(-)

---
Cc: "Krzysztof Wilczyński" <kwilczynski@kernel.org>
Cc: Bjorn Helgaas <bhelgaas@google.com>
Cc: Conor Dooley <conor+dt@kernel.org>
Cc: Geert Uytterhoeven <geert+renesas@glider.be>
Cc: Krzysztof Kozlowski <krzk+dt@kernel.org>
Cc: Lorenzo Pieralisi <lpieralisi@kernel.org>
Cc: Manivannan Sadhasivam <mani@kernel.org>
Cc: Rob Herring <robh@kernel.org>
Cc: Yoshihiro Shimoda <yoshihiro.shimoda.uh@renesas.com>
Cc: devicetree@vger.kernel.org
Cc: linux-kernel@vger.kernel.org
Cc: linux-pci@vger.kernel.org
Cc: linux-renesas-soc@vger.kernel.org

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2.53.0