arm64: dts: qcom: sdm845: Add first PCIe controller and PHY

Add the GEN2 PCIe controller and PHY found on SDM845.

Tested-by: Julien Massot <jmassot@softbankrobotics.com>
Reviewed-by: Vinod Koul <vkoul@kernel.org>
Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org>
Link: https://lore.kernel.org/r/20191107002247.1127689-2-bjorn.andersson@linaro.org


Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org>