The SM8550 SoC uses Synopsis eUSB2 PHY for USB 2.0.
Add a new driver for it.

The driver is based on a downstream implementation.
Signed-off-by: Abel Vesa <abel.vesa@linaro.org>
Link: https://lore.kernel.org/r/20230208183421.2874423-3-abel.vesa@linaro.orgSigned-off-by: Vinod Koul <vkoul@kernel.org>