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/Kconfig b/board/freescale/mx6sxsabreauto/Kconfig
new file mode 100644
index 0000000..ae2ea02
--- /dev/null
+++ b/board/freescale/mx6sxsabreauto/Kconfig
@@ -0,0 +1,12 @@
+if TARGET_MX6SXSABREAUTO
+
+config SYS_BOARD
+	default "mx6sxsabreauto"
+
+config SYS_VENDOR
+	default "freescale"
+
+config SYS_CONFIG_NAME
+	default "mx6sxsabreauto"
+
+endif