arm64: dts: exynos: gs101: define USI12 with I2C configuration

arm64: dts: exynos: gs101: define USI12 with I2C configuration

On the gs101-oriole board, i2c bus 12 has various USB-related
controllers attached to it.

Note the selection of the USI protocol is intentionally left for the
board dts file.

Signed-off-by: André Draszik <andre.draszik@linaro.org>
Reviewed-by: Sam Protsenko <semen.protsenko@linaro.org>
Reviewed-by: Tudor Ambarus <tudor.ambarus@linaro.org>
Link: https://lore.kernel.org/r/20240201161258.1013664-7-andre.draszik@linaro.org
Signed-off-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>