configs: Re-sync with cmd/Kconfig

Update the config.h and defconfig files for the commands that 8e3c036
converted over to Kconfig

Signed-off-by: Tom Rini <trini@konsulko.com>
diff --git a/configs/luan_defconfig b/configs/luan_defconfig
index ec443f9..e0fa805 100644
--- a/configs/luan_defconfig
+++ b/configs/luan_defconfig
@@ -3,9 +3,13 @@
 CONFIG_TARGET_LUAN=y
 CONFIG_OF_BOARD_SETUP=y
 CONFIG_HUSH_PARSER=y
+CONFIG_CMD_ASKENV=y
+CONFIG_CMD_GREPENV=y
 CONFIG_LOOPW=y
 CONFIG_CMD_I2C=y
 CONFIG_CMD_DHCP=y
+CONFIG_CMD_MII=y
 CONFIG_CMD_PING=y
+CONFIG_CMD_CACHE=y
 CONFIG_SYS_NS16550=y
 CONFIG_OF_LIBFDT=y