dt-bindings: phy: qcom: snps-eusb2: Document the X1E80100 compatible

Add the X1E80100 compatible to the list of supported PHYs.

Signed-off-by: Abel Vesa <abel.vesa@linaro.org>
Reviewed-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
Link: https://lore.kernel.org/r/20231122-phy-qualcomm-eusb2-x1e80100-v2-1-3ba9a8e5ade4@linaro.org


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