Add PCIe controller RC node for Tuna target. Change-Id: I5c81b2f691ded29ea49f35cf8afe2e41afb9930e Signed-off-by: Vivek Pernamitta <quic_vpernami@quicinc.com> Signed-off-by: Paras Sharma <quic_parass@quicinc.com>