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/M5485AFE_defconfig b/configs/M5485AFE_defconfig
index 917d4bd..abdf504 100644
--- a/configs/M5485AFE_defconfig
+++ b/configs/M5485AFE_defconfig
@@ -6,4 +6,6 @@
 CONFIG_CMD_I2C=y
 CONFIG_CMD_USB=y
 # CONFIG_CMD_SETEXPR is not set
+CONFIG_CMD_MII=y
 CONFIG_CMD_PING=y
+CONFIG_CMD_CACHE=y