ARM: dts: imx: Add alias for ethernet controller

Add alias for FEC ethernet on i.MX to allow bootloaders (like U-Boot)
patch-in the MAC address for FEC using this alias.

Signed-off-by: Marek Vasut <marex@denx.de>
Signed-off-by: Shawn Guo <shawn.guo@linaro.org>

diff --cc arch/arm/boot/dts/imx25.dtsi
Simple merge

diff --cc arch/arm/boot/dts/imx27.dtsi
Simple merge

diff --cc arch/arm/boot/dts/imx35.dtsi
Simple merge

diff --cc arch/arm/boot/dts/imx50.dtsi
Simple merge

diff --cc arch/arm/boot/dts/imx51.dtsi
Simple merge

diff --cc arch/arm/boot/dts/imx53.dtsi
Simple merge

diff --cc arch/arm/boot/dts/imx6qdl.dtsi
Simple merge

diff --cc arch/arm/boot/dts/imx6sl.dtsi
Simple merge