ARM: dts: rockchip: add watchdog node

This adds the Designware compatible watchdog found on RK3xxx Cortex-A9 SoCs.

Signed-off-by: Heiko Stuebner <heiko@sntech.de>

diff --cc arch/arm/boot/dts/rk3066a-bqcurie2.dts
Simple merge

diff --cc arch/arm/boot/dts/rk3066a.dtsi
Simple merge

diff --cc arch/arm/boot/dts/rk3188-radxarock.dts
Simple merge

diff --cc arch/arm/boot/dts/rk3188.dtsi
Simple merge

diff --cc arch/arm/boot/dts/rk3xxx.dtsi
Simple merge