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/x600_defconfig b/configs/x600_defconfig
index 05d2f350..1a07b9d 100644
--- a/configs/x600_defconfig
+++ b/configs/x600_defconfig
@@ -12,7 +12,11 @@
 CONFIG_CMD_GPIO=y
 # CONFIG_CMD_SETEXPR is not set
 CONFIG_CMD_DHCP=y
+CONFIG_CMD_MII=y
 CONFIG_CMD_PING=y
+CONFIG_CMD_CACHE=y
+CONFIG_CMD_FAT=y
+CONFIG_CMD_FS_GENERIC=y
 CONFIG_NETDEVICES=y
 CONFIG_ETH_DESIGNWARE=y
 CONFIG_USE_TINY_PRINTF=y