dt-bindings: mfd: syscon: add Rockchip RK3036/RK3228 qos compatibles

Document Rockchip RK3036/RK3228 qos compatibles

Signed-off-by: Alex Bee <knaerzche@gmail.com>
Reviewed-by: Heiko Stuebner <heiko@sntech.de>
Acked-by: Rob Herring <robh@kernel.org>
Signed-off-by: Lee Jones <lee.jones@linaro.org>