board: rockchip: Add Bananapi R2Pro Board

Add Bananapi R2 Pro board.

tested:
- sdcard
- both front usb-ports
- sata
- wan-port

lan-ports are connected to mt7531 switch where driver needs to be
separated from mtk ethernet-driver.

Signed-off-by: Frank Wunderlich <frank-w@public-files.de>
Reviewed-by: Kever Yang <kever.yang@rock-chips.com>
Reviewed-by: Jonas Karlman <jonas@kwiboo.se>
diff --git a/arch/arm/dts/Makefile b/arch/arm/dts/Makefile
index bde2176..fba7dfe 100644
--- a/arch/arm/dts/Makefile
+++ b/arch/arm/dts/Makefile
@@ -177,6 +177,7 @@
 	rk3566-soquartz-blade.dtb \
 	rk3566-soquartz-cm4.dtb \
 	rk3566-soquartz-model-a.dtb \
+	rk3568-bpi-r2-pro.dtb \
 	rk3568-evb.dtb \
 	rk3568-lubancat-2.dtb \
 	rk3568-nanopi-r5c.dtb \