Add devicetree bindings for i2s controller found on rk3399
processors from rockchip.
It's helpful to add full set of compatible strings for serials
of Rockchip SoCs (rk3066, rk3188, rk3288, rk3399).
Change-Id: Ida3f9ffecda52d81016bdb6edb640568ed8c872a
Acked-by: Rob Herring <robh@kernel.org>
Signed-off-by: Jianqun Xu <jay.xu@rock-chips.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
(cherry picked from commit 255edcdfab)
062fea424f