ARM: dts: exynos: Add Ethernet interface description for Odroid XU3 Lite

Add Ethernet interface description for Odroid XU3 Lite.

Add an alias to enable bootloaders to find the Ethernet interface
and assign a MAC address.

Signed-off-by: Łukasz Stelmach <l.stelmach@samsung.com>
Link: https://lore.kernel.org/r/20201103184412.18874-4-l.stelmach@samsung.com


Signed-off-by: Krzysztof Kozlowski <krzk@kernel.org>