dt-bindings: phy: samsung: move SATA phy I2C to trivial devices

The I2C interface for Samsung Exynos SoC SATA phy is a very simple and
limited, so move it to trivial devices.

Signed-off-by: Krzysztof Kozlowski <krzysztof.kozlowski@canonical.com>
Reviewed-by: Rob Herring <robh@kernel.org>
Link: https://lore.kernel.org/r/20220129193646.372481-7-krzysztof.kozlowski@canonical.com
Signed-off-by: Vinod Koul <vkoul@kernel.org>