ARM: dts: qcom: sdx55: Fix the unit address of PCIe EP node

Unit address of PCIe EP node should be 0x1c00000 as it has to match the
first address specified in the reg property.

This also requires sorting the node in the ascending order.

Fixes: e6b69813 ("ARM: dts: qcom: sdx55: Add support for PCIe EP")
Reviewed-by: Konrad Dybcio <konrad.dybcio@linaro.org>
Signed-off-by: Manivannan Sadhasivam <manivannan.sadhasivam@linaro.org>
Signed-off-by: Bjorn Andersson <andersson@kernel.org>
Link: https://lore.kernel.org/r/20230308082424.140224-6-manivannan.sadhasivam@linaro.org