In the imx6q-sabreauto and imx6dl-sabreauto boards,
the pin MX6Q{DL}_PAD_EIM_D19 is used as a GPIO for SPI NOR, but
it is used as a data pin for the WEIM NOR.

In order to fix the conflict, this patch removes the pin from the hog,
and adds a new board-level pinctrl: pinctrl_ecspi1_sabreauto.

The SPI NOR selects this pinctrl_ecspi1_sabreauto when it is enabled.
Signed-off-by: NHuang Shijie <b32955@freescale.com>
Signed-off-by: NShawn Guo <shawn.guo@linaro.org>

The SPI/NOR needs this gpio for CS.
So add this gpio in the hog pinctrl.
Signed-off-by: NHuang Shijie <b32955@freescale.com>
Signed-off-by: NShawn Guo <shawn.guo@linaro.org>

Add initial imx6dl-sabreauto support based on the common stuff already
in imx6qdl-sabreauto.dtsi.
Signed-off-by: NShawn Guo <shawn.guo@linaro.org>

Add initial imx6dl-sabresd support based on the common stuff already in
imx6qdl-sabresd.dtsi.
Signed-off-by: NShawn Guo <shawn.guo@linaro.org>