ARM: dts: qcom: sdx65: Add support for PCIe EP

Add support for PCIe Endpoint controller on the
Qualcomm SDX65 platform.

Signed-off-by: Rohit Agarwal <quic_rohiagar@quicinc.com>
Reviewed-by: Manivannan Sadhasivam <manivannan.sadhasivam@linaro.org>
Reviewed-by: Konrad Dybcio <konrad.dybcio@linaro.org>
Signed-off-by: Bjorn Andersson <andersson@kernel.org>
Link: https://lore.kernel.org/r/1684432073-28490-4-git-send-email-quic_rohiagar@quicinc.com