mx6ul_14x14_evk: Move CONFIG_DM_74X164 to defconfig

The CONFIG_DM_74X164 symbols should be moved to the defconfig file,
as indicated in the comments.

Signed-off-by: Fabio Estevam <festevam@gmail.com>
Reviewed-by: Tom Rini <trini@konsulko.com>
diff --git a/configs/mx6ul_14x14_evk_defconfig b/configs/mx6ul_14x14_evk_defconfig
index 60484e2..53ff67c 100644
--- a/configs/mx6ul_14x14_evk_defconfig
+++ b/configs/mx6ul_14x14_evk_defconfig
@@ -44,6 +44,7 @@
 CONFIG_ENV_IS_IN_MMC=y
 CONFIG_SYS_RELOC_GD_ENV_ADDR=y
 CONFIG_ENV_VARS_UBOOT_RUNTIME_CONFIG=y
+CONFIG_DM_74X164=y
 CONFIG_DM_I2C=y
 CONFIG_DM_MMC=y
 CONFIG_FSL_USDHC=y