linux-phytec-ti

PCI: endpoint: Add helper API to populate header with values from DT

Add helper API pci_epc_of_parse_header() to populate header with
values from device tree. These values will be written to the
configuration space header in the endpoint controller.

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