n1sdp: pcie: add quirk support enabling remote chip PCIe

Upstream-Status: Inappropriate [will not be submitted as its an hack required to fix the hardware issue]

This patch is picked from the git repository and ported 5.10:
https://git.linaro.org/landing-teams/working/arm/n1sdp-pcie-quirk.git/patch/?id=04b7e76d0fe6481a803f58e54e008a1489d713a5



Signed-off-by: Khasim Syed Mohammed <khasim.mohammed@arm.com>

Base address mapping for remote chip Root PCIe ECAM space.

Remote Chip PCIe topology is enumerated in Firmware and current
change takes referecne of enumerated PCIe hierarchy of Remote chip into the
kernel and include in complete PCIe topology for kernel framework.

Signed-off-by: Sayanta Pattanayak <sayanta.pattanayak@arm.com>