linux-phytec-ti

PCI: endpoint: Add support to associate secondary EPC with EPF

In the case of standard endpoint functions, only one endpoint
controller (EPC) will be associated with an endpoint function
(EPF). However for providing NTB (non transparent bridge)
functionality, two EPCs should be associated with a single EPF.
Add support to associate secondary EPC with EPF. This is in
preparation for adding NTB endpoint function driver.

Signed-off-by: Kishon Vijay Abraham I <kishon@ti.com>
Signed-off-by: Sekhar Nori <nsekhar@ti.com>