arm: dts: rockchip: Add initial DT for Pinebook Pro

Sync initial support for Pinebook Pro device tree from Linux 5.7-rc1.

Signed-off-by: Peter Robinson <pbrobinson@gmail.com>
Reviewed-by: Kever Yang <kever.yang@rock-chips.com>
diff --git a/arch/arm/dts/Makefile b/arch/arm/dts/Makefile
index 12ec6c7..c6af87c 100644
--- a/arch/arm/dts/Makefile
+++ b/arch/arm/dts/Makefile
@@ -129,6 +129,7 @@
 	rk3399-nanopi-m4-2gb.dtb \
 	rk3399-nanopi-neo4.dtb \
 	rk3399-orangepi.dtb \
+	rk3399-pinebook-pro.dtb \
 	rk3399-puma-ddr1333.dtb \
 	rk3399-puma-ddr1600.dtb \
 	rk3399-puma-ddr1866.dtb \