Merge branch 'pci/ntb'

Merge branch 'pci/ntb'

- Account for 64-bit BARs in pci_epc_get_first_free_bar() (Kishon Vijay
  Abraham I)

- Add pci_epc_get_next_free_bar() helper (Kishon Vijay Abraham I)

- Return error codes on failure of endpoint BAR interfaces (Kishon Vijay
  Abraham I)

- Remove unused pci_epf_match_device() (Kishon Vijay Abraham I)

- Add support for secondary endpoint controller to prepare for NTB endpoint
  functionality (Kishon Vijay Abraham I)

- Add configfs support for secondary endpoint controller (Kishon Vijay
  Abraham I)

- Add MSI address mapping ops for NTB doorbell support (Kishon Vijay
  Abraham I)

- Add ops for endpoint function-specific attributes (Kishon Vijay Abraham
  I)

- Allow configfs subdirectory for endpoint function configuration (Kishon
  Vijay Abraham I)

- Implement cadence MSI address mapping ops (Kishon Vijay Abraham I)

- Configure cadence LM_EP_FUNC_CFG based on epc->function_num_map (Kishon
  Vijay Abraham I)

- Add endpoint-side driver to provide NTB functionality (Kishon Vijay
  Abraham I)

- Add host-side driver for generic EPF NTB functionality (Kishon Vijay
  Abraham I)

- Document NTB endpoint functionality (Kishon Vijay Abraham I)

* pci/ntb:
  Documentation: PCI: Add PCI endpoint NTB function user guide
  Documentation: PCI: Add configfs binding documentation for pci-ntb endpoint function
  NTB: Add support for EPF PCI Non-Transparent Bridge
  PCI: Add TI J721E device to PCI IDs
  PCI: endpoint: Add EP function driver to provide NTB functionality
  PCI: cadence: Configure LM_EP_FUNC_CFG based on epc->function_num_map
  PCI: cadence: Implement ->msi_map_irq() ops
  PCI: endpoint: Allow user to create sub-directory of 'EPF Device' directory
  PCI: endpoint: Add pci_epf_ops to expose function-specific attrs
  PCI: endpoint: Add pci_epc_ops to map MSI IRQ
  PCI: endpoint: Add support in configfs to associate two EPCs with EPF
  PCI: endpoint: Add support to associate secondary EPC with EPF
  PCI: endpoint: Remove unused pci_epf_match_device()
  PCI: endpoint: Make *_free_bar() to return error codes on failure
  PCI: endpoint: Add helper API to get the 'next' unreserved BAR
  PCI: endpoint: Make *_get_first_free_bar() take into account 64 bit BAR
  Documentation: PCI: Add specification for the PCI NTB function device