dt-bindings: phy: qcom,snps-eusb2: document the Milos Synopsys eUSB2 PHY

Document the Synopsys eUSB2 PHY on the Milos SoC by using the SM8550 as
fallback.

Acked-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
Signed-off-by: Luca Weiss <luca.weiss@fairphone.com>
Link: https://lore.kernel.org/r/20250715-sm7635-eusb-phy-v3-2-6c3224085eb6@fairphone.com


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