ASoC: rockchip: i2s: Add compatible for RK3588

The Rockchip I2S driver supports the RK3588/RK3588S SoCs, hence add the
corresponding compatible string.

Signed-off-by: Cristian Ciocaltea <cristian.ciocaltea@collabora.com>
Link: https://lore.kernel.org/r/20230315114806.3819515-9-cristian.ciocaltea@collabora.com
Signed-off-by: Mark Brown <broonie@kernel.org>

sound/soc/rockchip/rockchip_i2s.c

@@ -659,6 +659,7 @@ static const struct of_device_id rockchip_i2s_match[] __maybe_unused = {
 	{ .compatible = "rockchip,rk3366-i2s", },
 	{ .compatible = "rockchip,rk3368-i2s", },
 	{ .compatible = "rockchip,rk3399-i2s", .data = &rk3399_i2s_pins },
+	{ .compatible = "rockchip,rk3588-i2s", },
 	{ .compatible = "rockchip,rv1126-i2s", },
 	{},
 };