ANDROID: PCI: qcom: Add support for SDM845 PCIe controller

The SDM845 has one Gen2 and one Gen3 controller, add support for these.

Due to lack of hardware only the Gen2 controller has been verified.

Bug: 146449535
Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org>
(cherry picked from commit ff885cfa19c77f4e16b797c3aa9a5f588fecf50c
https://git.linaro.org/landing-teams/working/qualcomm/kernel.git


qclt/integration-linux-qcomlt  - An unstable rebased branch)
Signed-off-by: John Stultz <john.stultz@linaro.org>
Change-Id: I76e60cca47c9b6cab5252a28a9748e5f8fe4b51b