imx6: geam6ul: Add NAND support

Add NAND support for Engicam GEAM6UL board.

Boot Log:
--------
U-Boot SPL 2016.11-g537fa5f (Nov 28 2016 - 11:42:28)
Trying to boot from NAND
NAND : 256 MiB

U-Boot 2016.11-g537fa5f (Nov 28 2016 - 11:20:06 +0100)

CPU:   Freescale i.MX6UL rev1.1 69 MHz (running at 396 MHz)
CPU:   Automotive temperature grade (-40C to 125C) at 42C
Reset cause: WDOG
Model: Engicam GEAM6UL
DRAM:  128 MiB
NAND:  256 MiB
MMC:   FSL_SDHC: 0
* Warning - bad CRC, using default environment

In:    serial
Out:   serial
Err:   serial
Net:   No ethernet found.
Hit any key to stop autoboot:  0

Cc: Stefano Babic <sbabic@denx.de>
Cc: Matteo Lisi <matteo.lisi@engicam.com>
Cc: Michael Trimarchi <michael@amarulasolutions.com>
Signed-off-by: Jagan Teki <jagan@amarulasolutions.com>
diff --git a/configs/imx6ul_geam_nand_defconfig b/configs/imx6ul_geam_nand_defconfig
new file mode 100644
index 0000000..b7a44c7
--- /dev/null
+++ b/configs/imx6ul_geam_nand_defconfig
@@ -0,0 +1,34 @@
+CONFIG_ARM=y
+CONFIG_ARCH_MX6=y
+CONFIG_TARGET_MX6UL_GEAM=y
+CONFIG_SYS_EXTRA_OPTIONS="IMX_CONFIG=arch/arm/imx-common/spl_sd.cfg,ENV_IS_IN_NAND"
+CONFIG_DEFAULT_FDT_FILE="imx6ul-geam-kit.dtb"
+CONFIG_DEFAULT_DEVICE_TREE="imx6ul-geam-kit"
+CONFIG_SYS_PROMPT="geam6ul> "
+CONFIG_SPL=y
+CONFIG_BOOTDELAY=3
+CONFIG_BOARD_EARLY_INIT_F=y
+CONFIG_DISPLAY_CPUINFO=y
+CONFIG_HUSH_PARSER=y
+CONFIG_AUTO_COMPLETE=y
+CONFIG_SYS_MAXARGS=32
+# CONFIG_CMD_IMLS is not set
+# CONFIG_BLK is not set
+# CONFIG_DM_MMC_OPS is not set
+CONFIG_CMD_BOOTZ=y
+CONFIG_CMD_GPIO=y
+CONFIG_CMD_MEMTEST=y
+CONFIG_CMD_NAND=y
+CONFIG_CMD_CACHE=y
+CONFIG_OF_LIBFDT=y
+CONFIG_MXC_UART=y
+CONFIG_NAND_MXS=y
+CONFIG_IMX_THERMAL=y
+CONFIG_PINCTRL=y
+CONFIG_PINCTRL_IMX6=y
+CONFIG_SPL_LIBCOMMON_SUPPORT=y
+CONFIG_SPL_LIBGENERIC_SUPPORT=y
+CONFIG_SPL_SERIAL_SUPPORT=y
+CONFIG_SPL_GPIO_SUPPORT=y
+CONFIG_SPL_WATCHDOG_SUPPORT=y
+CONFIG_SPL_DMA_SUPPORT=y