arm: imx: add i.MX6ULL 14x14 EVK board support

Add i.MX6ULL EVK board support:
Add device tree file, which is copied from NXP Linux.
Enabled DM_MMC, DM_GPIO, DM_I2C, DM_SPI, PINCTRL, DM_REGULATOR.
The uart iomux settings are still keeped in board file.

Boot Log:
U-Boot 2016.09-rc1-00366-gbb419ef-dirty (Aug 11 2016 - 13:08:58 +0800)

CPU:   Freescale i.MX6ULL rev1.0 at 396MHz
CPU:   Commercial temperature grade (0C to 95C) at 15C
Reset cause: POR
Model: Freescale i.MX6 ULL 14x14 EVK Board
Board: MX6ULL 14x14 EVK
DRAM:  512 MiB
MMC:   initialized IMX pinctrl driver
FSL_SDHC: 0, FSL_SDHC: 1
In:    serial
Out:   serial
Err:   serial
Net:   CPU Net Initialization Failed
No ethernet found.
Hit any key to stop autoboot:  0
=> mmc dev 1
switch to partitions #0, OK
mmc1 is current device

Signed-off-by: Peng Fan <peng.fan@nxp.com>
Cc: Stefano Babic <sbabic@denx.de>
diff --git a/arch/arm/cpu/armv7/mx6/Kconfig b/arch/arm/cpu/armv7/mx6/Kconfig
index 32405c6..d851b26 100644
--- a/arch/arm/cpu/armv7/mx6/Kconfig
+++ b/arch/arm/cpu/armv7/mx6/Kconfig
@@ -137,6 +137,12 @@
 	select DM_THERMAL
 	select SUPPORT_SPL
 
+config TARGET_MX6ULL_14X14_EVK
+	bool "Support mx6ull_14x14_evk"
+	select MX6ULL
+	select DM
+	select DM_THERMAL
+
 config TARGET_NITROGEN6X
 	bool "nitrogen6x"
 
@@ -226,6 +232,7 @@
 source "board/freescale/mx6sxsabresd/Kconfig"
 source "board/freescale/mx6sxsabreauto/Kconfig"
 source "board/freescale/mx6ul_14x14_evk/Kconfig"
+source "board/freescale/mx6ullevk/Kconfig"
 source "board/phytec/pcm058/Kconfig"
 source "board/gateworks/gw_ventana/Kconfig"
 source "board/kosagi/novena/Kconfig"