ARM: dts: rockchip: add BQ Edison 2 QC devicetree

The Edison 2 Quad-Core was a Tablet device released in 2013 by MundoReader
using a rk3188 soc. Add a devicetree for it.
Signed-off-by: Heiko Stuebner <heiko.stuebner@bq.com>
Reviewed-by: Rob Herring <robh@kernel.org>

Documentation/devicetree/bindings/arm/rockchip.txt

@@ -33,6 +33,10 @@ Rockchip platforms device tree bindings
     Required root node properties:
       - compatible = "mundoreader,bq-curie2", "rockchip,rk3066a";
 
+- bq Edison 2 Quad-Core tablet:
+    Required root node properties:
+      - compatible = "mundoreader,bq-edison2qc", "rockchip,rk3188";
+
 - ChipSPARK Rayeager PX2 board:
     Required root node properties:
       - compatible = "chipspark,rayeager-px2", "rockchip,rk3066a";

arch/arm/boot/dts/Makefile

@@ -854,6 +854,7 @@ dtb-$(CONFIG_ARCH_ROCKCHIP) += \
 	rk3066a-marsboard.dtb \
 	rk3066a-mk808.dtb \
 	rk3066a-rayeager.dtb \
+	rk3188-bqedison2qc.dtb \
 	rk3188-px3-evb.dtb \
 	rk3188-radxarock.dtb \
 	rk3228-evb.dtb \