ODROID-C5: net: dwmac-meson8b: Add WOL with external ethernet phy

This patch adds to Wake On Lan with an extern ethernet phy and the wake
up is triggered through a GPIO pin. GPIOH_10 on ODROID-C5 is connected
to #INT of RTL8211F.

The method to enable WOL in generic Linux:
    $ sudo ethtool -s eth0 wol ug
    $ sudo systemctl suspend

The Amlogic's method is:
    $ echo 1 | sudo tee /sys/class/ethernet/wol
    $ sudo systemctl suspend

Signed-off-by: Dongjin Kim <tobetter@gmail.com>
Change-Id: I6032f8ff20be83ab1846580c854824014b957470
1 file changed