rockchip: rk3399: split rockpro64 out of evb_rk3399

rockpro64 needs to setup I/O domains in order for USB to work in u-boot.
Since we currently don't have a driver to do that, split it into its own
board file and initialize I/O domains here.

Signed-off-by: Vasily Khoruzhick <anarsoul@gmail.com>
Reviewed-by: Kever Yang <kever.yang@rock-chips.com>
diff --git a/board/pine64/rockpro64_rk3399/MAINTAINERS b/board/pine64/rockpro64_rk3399/MAINTAINERS
new file mode 100644
index 0000000..303db14
--- /dev/null
+++ b/board/pine64/rockpro64_rk3399/MAINTAINERS
@@ -0,0 +1,8 @@
+ROCKPRO64
+M:	Akash Gajjar <akash@openedev.com>
+M:	Jagan Teki <jagan@amarulasolutions.com>
+S:	Maintained
+F:	board/pine64/rockpro64_rk3399
+F:	include/configs/rockpro64_rk3399.h
+F:	arch/arm/dts/rk3399-rockpro64-u-boot.dtsi
+F:	configs/rockpro64-rk3399_defconfig