HSD #22012268110: net: ethernet: altera: E-Tile fixed link implementation

commit 932869aa5d80cf9aebb672f1096e1d09a7b8d92e from
https://github.com/altera-opensource/linux-socfpga.git



This patch implements fixed link device tree binding handling at the E-Tile
ethernet MAC driver as the E-Tile ethernet MAC is not connected to a normal
MDIO-managed PHY device.

Signed-off-by: Tham, Mun Yew <mun.yew.tham@intel.com>
Signed-off-by: Wenlin Kang <wenlin.kang@windriver.com>
Signed-off-by: Bruce Ashfield <bruce.ashfield@gmail.com>