ARM: dts: imx6qdl-sabreauto: enable the WEIM NOR

Enable the WEIM NOR for imx6q{dl}-sabreauto boards.

For the pin conflict with SPI NOR, its status is set to "disabled".

Signed-off-by: Huang Shijie <b32955@freescale.com>
Signed-off-by: Shawn Guo <shawn.guo@linaro.org>