odroid u3: enable dm i2c support

This patch enables CONFIG_DM_I2C and also CONFIG_DM_I2C_COMPAT.
The last one should be removed when the dm pmic framework will
be finished.

Signed-off-by: Przemyslaw Marczak <p.marczak@samsung.com>
Acked-by: Simon Glass <sjg@chromium.org>
Cc: Minkyu Kang <mk7.kang@samsung.com>