Merge branch 'remotes/lorenzo/pci/endpoint'

- Add a .release() callback for the Endpoint Controller library so an
  Endpoint driver is removable (Yoshihiro Shimoda)

- Fix pci-epf-vntb kernel-doc and whitespace (Frank Li)

- Fix pci-epf-vntb error path usage of pci_epc_mem_free_addr() (Frank Li)

- Remove pci-epf-vntb unused epf_db_phy (Frank Li)

- Fix pci-epf-vntb sparse warnings (Frank Li)

* remotes/lorenzo/pci/endpoint:
  PCI: endpoint: pci-epf-vntb: Fix sparse ntb->reg build warning
  PCI: endpoint: pci-epf-vntb: Fix sparse build warning for epf_db
  PCI: endpoint: pci-epf-vntb: Replace hardcoded 4 with sizeof(u32)
  PCI: endpoint: pci-epf-vntb: Remove unused epf_db_phy struct member
  PCI: endpoint: pci-epf-vntb: Fix call pci_epc_mem_free_addr() in error path
  PCI: endpoint: pci-epf-vntb: Fix struct epf_ntb_ctrl indentation
  PCI: endpoint: pci-epf-vntb: Clean up kernel_doc warning
  PCI: endpoint: Fix WARN() when an endpoint driver is removed