linux-phytec-ti

ARM: socfpga: dts: enable ethernet for Arria10 devkit

Update the arria10 gmac nodes with all the necessary properties for ethernet
to function on the Arria10 devkit.

Signed-off-by: Dinh Nguyen <dinguyen@opensource.altera.com>
Signed-off-by: Kevin Hilman <khilman@linaro.org>