ARM: uniphier: enable CONFIG_CMD_CONFIG

This command is useful to see which config options are enabled on
the running U-Boot image.

Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
diff --git a/configs/uniphier_pxs2_ld6b_defconfig b/configs/uniphier_pxs2_ld6b_defconfig
index 00db8b0..7a358e3 100644
--- a/configs/uniphier_pxs2_ld6b_defconfig
+++ b/configs/uniphier_pxs2_ld6b_defconfig
@@ -12,6 +12,7 @@
 CONFIG_SPL=y
 CONFIG_SPL_NOR_SUPPORT=y
 CONFIG_HUSH_PARSER=y
+CONFIG_CMD_CONFIG=y
 CONFIG_CMD_BOOTZ=y
 # CONFIG_CMD_XIMG is not set
 # CONFIG_CMD_ENV_EXISTS is not set