dt-bindings: phy: qcom,qmp: Add SM8250 PCIe PHY bindings

Add the below three PCIe PHYs found in SM8250 to the QMP binding:

QMP GEN3x1 PHY - 1 lane
QMP GEN3x2 PHY - 2 lanes
QMP Modem PHY - 2 lanes

Signed-off-by: Manivannan Sadhasivam <manivannan.sadhasivam@linaro.org>
Acked-by: Rob Herring <robh@kernel.org>
Link: https://lore.kernel.org/r/20201027170033.8475-2-manivannan.sadhasivam@linaro.org


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