ARM: dts: AM33XX: fix ethernet and mdio default state

Make sure ethernet and mdio nodes are disabled by default and enable
them explicitly only on boards that actually use them.

Signed-off-by: Johan Hovold <jhovold@gmail.com>
Signed-off-by: Tony Lindgren <tony@atomide.com>

diff --cc arch/arm/boot/dts/am335x-bone-common.dtsi
Simple merge

diff --cc arch/arm/boot/dts/am335x-evm.dts
Simple merge

diff --cc arch/arm/boot/dts/am335x-evmsk.dts
Simple merge

diff --cc arch/arm/boot/dts/am335x-igep0033.dtsi
Simple merge

diff --cc arch/arm/boot/dts/am335x-nano.dts
Simple merge

diff --cc arch/arm/boot/dts/am33xx.dtsi
Simple merge