Make sure ethernet and mdio nodes are disabled by default and enable
them explicitly only on boards that actually use them.
Signed-off-by: NJohan Hovold <jhovold@gmail.com>
Signed-off-by: NTony Lindgren <tony@atomide.com>

NanoBone Specification:
-----------------------
CPU:
  TI AM335x

Memory:
  256MB DDR3
  128MB NOR flash
  128KB FRAM

Ethernet:
  2 x 10/100 connected to SMSC LAN8710 PHY

USB:
  1 x USB2.0 Type A

I2C:
  2Kbit EEPROM (Microchip 24AA02)
  RTC (Maxim DS1338)
  GPIO Expander (Microchip MCP23017)

Expansion connector:
  6 x UART
  1 x MMC/SD
  1 x USB2.0
Signed-off-by: NMark Jackson <mpfj@newflow.co.uk>
Reviewed-by: NJavier Martinez Canillas <javier.martinez@collabora.co.uk>
Signed-off-by: NBenoit Cousson <bcousson@baylibre.com>