dt-bindings: phy: qcom,snps-eusb2-phy: Add phys property for the repeater

The phys property is used for allowing the eusb2 to interface
with the repeater, which is modelled as a phy driver.

Signed-off-by: Abel Vesa <abel.vesa@linaro.org>
Acked-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
Link: https://lore.kernel.org/r/20230208190200.2966723-4-abel.vesa@linaro.org


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