Populate ->get_features() dw_pcie_ep_ops to return the EPC features
supported by Designware PCIe endpoint controller.
Tested-by: NGustavo Pimentel <gustavo.pimentel@synopsys.com>
Signed-off-by: NKishon Vijay Abraham I <kishon@ti.com>
Signed-off-by: NLorenzo Pieralisi <lorenzo.pieralisi@arm.com>