Chen-Yu Tsai authored May 03, 2019 and Jagan Teki committed May 09, 2019

The Bananapi M3 has an RTL8211E PHY connected to the EMAC using
RGMII. The PHY is powered by DCDC1 through SW @ 3.3V.

The board is designed to use 3.3V with RGMII, instead of the standard
reduced voltage of 2.5V we see everywhere. DLDO3, which provides the
I/O voltages, is raised to match.

This patch enables the EMAC and Realtek PHY drivers in the defconfig.
The device tree file already has the EMAC enabled.

Signed-off-by: Chen-Yu Tsai <wens@csie.org>
Reviewed-by: Jagan Teki <jagan@amarulasolutions.com>