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/a3m071_defconfig b/configs/a3m071_defconfig
index b47e308..97e4fc5 100644
--- a/configs/a3m071_defconfig
+++ b/configs/a3m071_defconfig
@@ -8,7 +8,9 @@
 CONFIG_LOOPW=y
 # CONFIG_CMD_SETEXPR is not set
 CONFIG_CMD_DHCP=y
+CONFIG_CMD_MII=y
 CONFIG_CMD_PING=y
 CONFIG_CMD_LINK_LOCAL=y
+CONFIG_CMD_CACHE=y
 CONFIG_LIB_RAND=y
 CONFIG_OF_LIBFDT=y