Add two build configs for i.MX6ULL 9X9 EVK. And update lpddr2 script for the board to version 1.0.
DDR script: IMX6ULL_9X9_LPDDR2_400MHz_16bit_V1.0.inc
Changes: Initial version
Test: Passed memtester overnight test on 1 board.
Signed-off-by: Ye Li
CONFIG_SYS_EXTRA_OPTIONS="IMX_CONFIG=board/freescale/mx6ullevk/imximage_lpddr2.cfg" CONFIG_ARM=y CONFIG_ARCH_MX6=y CONFIG_TARGET_MX6ULL_9X9_EVK=y CONFIG_CMD_GPIO=y
