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/C29XPCIE_NOR_SECBOOT_defconfig b/configs/C29XPCIE_NOR_SECBOOT_defconfig
index 5bedcb4..032be47 100644
--- a/configs/C29XPCIE_NOR_SECBOOT_defconfig
+++ b/configs/C29XPCIE_NOR_SECBOOT_defconfig
@@ -10,6 +10,7 @@
 CONFIG_HUSH_PARSER=y
 CONFIG_CMD_SF=y
 CONFIG_CMD_I2C=y
+CONFIG_CMD_MII=y
 CONFIG_CMD_PING=y
 CONFIG_DM=y
 CONFIG_SPI_FLASH=y