Add mt7531 dsa to bananapi-bpi-r64 board for 5 giga Ethernet ports support.
Signed-off-by: NLanden Chao <landen.chao@mediatek.com>
Tested-By: NFrank Wunderlich <frank-w@public-files.de>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>