imx: mx6sxsabreauto: Add support for mx6sx SABREAUTO board

Initial version for mx6sx SABREAUTO board support with features:
PMIC, QSPI, NAND flash, SD/MMC, USB, Ethernet, I2C, IO Expander.

Signed-off-by: Ye Li <ye.li@nxp.com>
diff --git a/board/freescale/mx6sxsabreauto/MAINTAINERS b/board/freescale/mx6sxsabreauto/MAINTAINERS
new file mode 100644
index 0000000..6f2ff44
--- /dev/null
+++ b/board/freescale/mx6sxsabreauto/MAINTAINERS
@@ -0,0 +1,6 @@
+MX6SXSABREAUTO BOARD
+M:	Fabio Estevam <fabio.estevam@nxp.com>
+S:	Maintained
+F:	board/freescale/mx6sxsabreauto/
+F:	include/configs/mx6sxsabreauto.h
+F:	configs/mx6sxsabreauto_defconfig