linux-phytec-ti

ASoC: rockchip: add bindings for spdif controller

this patch add compatible for rk3366/rk3368/rk3399 spdif,
these three spdifs share the same type.

Signed-off-by: Sugar Zhang <sugar.zhang@rock-chips.com>
Signed-off-by: Mark Brown <broonie@kernel.org>