Add vmmc-supply for mmc device, so that the power to mmc slot can be
turned on by mmc driver if bootloader hasn't done it.

Also remove "okay" status for mmc1/ssp1, as the device has pin conflict
with gpmi-nand.  Actually the device is already disabled since the
mxs-mmc driver adopts pinctrl support because there is no pinctrl setup
for the device in dts.  Make this explicit by removing "okay" status.
Signed-off-by: NShawn Guo <shawn.guo@linaro.org>

Before gpio_request can directly ask pinctrl system to configure the
requested pin into gpio mode, we use "hog" entry (pinctrl state of
pin controller itself) to configure gpios.
Signed-off-by: NShawn Guo <shawn.guo@linaro.org>

Add auart0 and auart3 support.
Signed-off-by: NFabio Estevam <fabio.estevam@freescale.com>
Reviewed-by: NMarek Vasut <marex@denx.de>
Signed-off-by: NShawn Guo <shawn.guo@linaro.org>

add gpmi-nand device tree support.
add gpmi-nand pinctrl support.

Also enable the gpmi support for mx28-evk board.
Signed-off-by: NHuang Shijie <b32955@freescale.com>
Signed-off-by: NShawn Guo <shawn.guo@linaro.org>

Signed-off-by: NShawn Guo <shawn.guo@linaro.org>

Signed-off-by: NShawn Guo <shawn.guo@linaro.org>

Signed-off-by: NShawn Guo <shawn.guo@linaro.org>

This patch includes basic dt support which can boot via nfs rootfs.
Signed-off-by: NDong Aisheng <dong.aisheng@linaro.org>
Signed-off-by: NShawn Guo <shawn.guo@linaro.org>
Acked-by: NMarek Vasut <marex@denx.de>