dt-bindings: phy: samsung,usb3-drd-phy: Add Exynos850 support

Document Exynos850 compatible. USB 2.0 DRD PHY on Exynos850 has two
clocks (ref and phy), which is already described in bindings.

Signed-off-by: Sam Protsenko <semen.protsenko@linaro.org>
Reviewed-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
Link: https://lore.kernel.org/r/20230819031731.22618-3-semen.protsenko@linaro.org


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