phy: qcom: Add QCOM SNPS eUSB2 repeater driver

PM8550B contains a eUSB2 repeater used for making the eUSB2 from
SM8550 USB 2.0 compliant. This can be modelled SW-wise as a Phy.
So add a new phy driver for it.

Signed-off-by: Abel Vesa <abel.vesa@linaro.org>
Link: https://lore.kernel.org/r/20230208190200.2966723-5-abel.vesa@linaro.org


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