BACKPORT: FROMGIT: arm64: dts: qcom: qcs404: Add pcie phy and controller

Adding pcie phy and controller for qcs404

Change-Id: I8568848b225437d570010240ca782a3f32a138ad
Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org>
(cherry picked from commit eee61fcf72c633d099222480d11b3bb4910e28b2
https://git.linaro.org/people/niklas.cassel/kernel.git/commit/?h=niklas-qcs404-pcie-4.14

)
Signed-off-by: Prashanth Vadde <pvadde@codeaurora.org>
Reviewed-on: https://chromium-review.googlesource.com/c/1343766


Reviewed-by: Zhihong Yu <zhihongyu@chromium.org>
Tested-by: Zhihong Yu <zhihongyu@chromium.org>