dt-bindings: phy: samsung,usb3-drd-phy: convert to dtschema

Convert the Samsung Exynos USB 3.0 DRD PHY bindings to DT schema format.

Except the conversion, add also vbus-supply and vbus-boost-supply
properties which were already used by the driver and DTS.

Signed-off-by: Krzysztof Kozlowski <krzysztof.kozlowski@canonical.com>
Reviewed-by: Rob Herring <robh@kernel.org>
Link: https://lore.kernel.org/r/20220129193646.372481-8-krzysztof.kozlowski@canonical.com
Signed-off-by: Vinod Koul <vkoul@kernel.org>