dt-bindings: phy: qcom,sc8280xp-qmp-pcie-phy: Document the QCS615 QMP PCIe PHY Gen3 x1

Document the QMP PCIe PHY on the QCS615 platform.

Signed-off-by: Krishna chaitanya chundru <quic_krichai@quicinc.com>
Signed-off-by: Ziyue Zhang <quic_ziyuzhan@quicinc.com>
Acked-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
Link: https://lore.kernel.org/r/20241122023314.1616353-2-quic_ziyuzhan@quicinc.com


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