How to use PCIE C4 root port?

[Kimber]

@PCIe C4 not working

phys = <&p2u_8>,
                      <&p2u_9>;

Our board actually uses the X1 mode of PCIE C4, do we just add

phys = <&p2u_8>;
phy-names = “pcie-p2u-0”;