FROMGIT: phy: qcom: Add Qualcomm PCIe PHY driver

Change-Id: I01543758fd8792c5411fcab660662ecda6ce9b01
Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org>
(cherry picked from commit 04b278d2f573fdcf73a3e72e612852d7e0746901
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/1343762


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