Use GPIO support by adding SD card detection configuration and
GPIO pinmux for Colibri's standard GPIO pins. Attach the GPIO
pins to the iomuxc node to get the GPIO pin settings applied.
Signed-off-by: NStefan Agner <stefan@agner.ch>
Acked-by: NLinus Walleij <linus.walleij@linaro.org>
Signed-off-by: NShawn Guo <shawn.guo@linaro.org>