Change Details

As far as I know, we have no .dts currently passing in syscon register, so this shouldn't break anything -- .dts that uses this will come in with the 4.15 import.

Maintain backwards compatibility with the old method for boards that we get .dtb from u-boot, such as pine64, while accommodating the Linux 4.15 method of using syscon for emac.

As far as I know, we have no .dts currently passing in syscon registerMaintain backwards compatibility with the old method for boards that we get .dtb from u-boot, such as pine64, so this shouldn't break anythwhile accommodating -- .dts that uses this will come in with the 4.15 importthe Linux 4.15 method of using syscon for emac.