arm64: dts: qcom: sm8450: Add PCIe bridge node

arm64: dts: qcom: sm8450: Add PCIe bridge node

On Qcom SoCs, the PCIe host bridge is connected to a single PCIe bridge
for each controller instance. Hence, add a node to represent the bridge.

Reviewed-by: Neil Armstrong <neil.armstrong@linaro.org>
Signed-off-by: Manivannan Sadhasivam <manivannan.sadhasivam@linaro.org>
Reviewed-by: Konrad Dybcio <konrad.dybcio@linaro.org>
Link: https://lore.kernel.org/r/20240321-pcie-qcom-bridge-dts-v2-5-1eb790c53e43@linaro.org
Signed-off-by: Bjorn Andersson <andersson@kernel.org>