dt-bindings: phy: qcom,uniphy-pcie: Document PCIe uniphy

Document the Qualcomm UNIPHY PCIe 28LP present in IPQ5332.

Reviewed-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
Signed-off-by: Nitheesh Sekar <quic_nsekar@quicinc.com>
Signed-off-by: Varadarajan Narayanan <quic_varada@quicinc.com>
Link: https://lore.kernel.org/r/20250220094251.230936-2-quic_varada@quicinc.com


Signed-off-by: Vinod Koul <vkoul@kernel.org>