arm64: dts: qcom: sc8180x: Move PCIe phy and GPIOs to root port node

The PCIe phy reference and the perst/wake GPIO properties are
per root port and belong in the root port node (pcie@0), not in the
RC controller node. Move phys and phy-names from the controller to
pcie0_port0, pcie1_port0, pcie2_port0, and pcie3_port0, adding
labels to these nodes to allow board-level overrides. Move
perst-gpios/wake-gpios from the controller overrides to the
respective port nodes in the board files, renaming perst-gpios to
reset-gpios to match the binding used in the root port context.

Reviewed-by: Konrad Dybcio <konrad.dybcio@oss.qualcomm.com>
Signed-off-by: Krishna Chaitanya Chundru <krishna.chundru@oss.qualcomm.com>
Reviewed-by: Abel Vesa <abel.vesa@oss.qualcomm.com>
Link: https://patch.msgid.link/20260917-root_port_v2-v2-5-6272b7caae9a@oss.qualcomm.com
Signed-off-by: Bjorn Andersson <andersson@kernel.org>

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