The Rock 2 square board has a USB -> SATA converter hooked up to its usb
host1 connection. Enable the usb controller and always turn on the power
on the 5V sata power connector (controlled by gpio).
Signed-off-by: Sjoerd Simons <sjoerd.simons@collabora.co.uk>
Signed-off-by: Heiko Stuebner <heiko@sntech.de>