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/espt_defconfig b/configs/espt_defconfig
index 9d491cf..78e319c 100644
--- a/configs/espt_defconfig
+++ b/configs/espt_defconfig
@@ -16,6 +16,7 @@
 # CONFIG_CMD_ITEST is not set
 # CONFIG_CMD_SOURCE is not set
 # CONFIG_CMD_SETEXPR is not set
+CONFIG_CMD_MII=y
 CONFIG_CMD_PING=y
 # CONFIG_CMD_MISC is not set
 CONFIG_USE_PRIVATE_LIBGCC=y