ARM: dts: imx27 phyCARD-S, move i2c1 and owire to rdk

Both buses are not used on the phyCARD-S module. This patch moves them
to the rdk file. Remove ioexpander.

Signed-off-by: Markus Pargmann <mpa@pengutronix.de>
Signed-off-by: Shawn Guo <shawn.guo@linaro.org>