Commit a5c8e1ffe9d9 for kernel

commit a5c8e1ffe9d92f76b62c515506121c7870ec7fcf
Merge: d04ef0d3b44e e373c789bac0
Author: Bjorn Helgaas <bhelgaas@google.com>
Date:   Tue Jun 23 17:32:16 2026 -0500

    Merge branch 'pci/controller/loongson'

    - Ignore downstream devices only on internal bridges to avoid Loongson
      hardware issue (Rong Zhang)

    - Quirk old Loongson-3C6000 bridges that advertise incorrect supported link
      speeds (Ziyao Li)

    * pci/controller/loongson:
      PCI: loongson: Override PCIe bridge supported speeds for Loongson-3C6000 series
      PCI: loongson: Do not ignore downstream devices on external bridges