imx: mx7dsabresd: Add support for MX7D SABRESD board

* Add i.MX7D SABRESD target board support with enabled modules:
  UART, PMIC, USB/OTG, SD, eMMC, ENET, I2C, 74LV IOX.

  Build target: mx7dsabresd_config

Signed-off-by: Peng Fan <Peng.Fan@freescale.com>
Signed-off-by: Fugang Duan <B38611@freescale.com>
Signed-off-by: Ye.Li <B37916@freescale.com>
Signed-off-by: Adrian Alonso <aalonso@freescale.com>
diff --git a/configs/mx7dsabresd_defconfig b/configs/mx7dsabresd_defconfig
new file mode 100644
index 0000000..bb95424
--- /dev/null
+++ b/configs/mx7dsabresd_defconfig
@@ -0,0 +1,14 @@
+CONFIG_SYS_EXTRA_OPTIONS="IMX_CONFIG=board/freescale/mx7dsabresd/imximage.cfg,MX7D"
+CONFIG_ARM=y
+CONFIG_ARCH_MX7=y
+CONFIG_TARGET_MX7DSABRESD=y
+CONFIG_SYS_MALLOC_F=y
+CONFIG_SYS_MALLOC_F_LEN=0x400
+CONFIG_CMD_NET=y
+CONFIG_CMD_PING=y
+CONFIG_CMD_DHCP=y
+# CONFIG_CMD_BOOTD is not set
+# CONFIG_CMD_SETEXPR is not set
+# CONFIG_CMD_IMI is not set
+# CONFIG_CMD_IMLS is not set
+# CONFIG_CMD_XIMG is not set