ARM: shmobile: r8a7790: Add Audio MIX support on DTSI

Signed-off-by: Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>
Tested-by: Keita Kobayashi <keita.kobayashi.ym@renesas.com>
Signed-off-by: Simon Horman <horms+renesas@verge.net.au>

arch/arm/boot/dts/r8a7790.dtsi

@@ -1540,6 +1540,7 @@
 			<&mstp10_clks R8A7790_CLK_SCU_SRC3>, <&mstp10_clks R8A7790_CLK_SCU_SRC2>,
 			<&mstp10_clks R8A7790_CLK_SCU_SRC1>, <&mstp10_clks R8A7790_CLK_SCU_SRC0>,
 			<&mstp10_clks R8A7790_CLK_SCU_CTU0_MIX0>, <&mstp10_clks R8A7790_CLK_SCU_CTU1_MIX1>,
+			<&mstp10_clks R8A7790_CLK_SCU_CTU0_MIX0>, <&mstp10_clks R8A7790_CLK_SCU_CTU1_MIX1>,
 			<&mstp10_clks R8A7790_CLK_SCU_DVC0>, <&mstp10_clks R8A7790_CLK_SCU_DVC1>,
 			<&audio_clk_a>, <&audio_clk_b>, <&audio_clk_c>, <&m2_clk>;
 		clock-names = "ssi-all",
@@ -1548,6 +1549,7 @@
 				"src.9", "src.8", "src.7", "src.6", "src.5",
 				"src.4", "src.3", "src.2", "src.1", "src.0",
 				"ctu.0", "ctu.1",
+				"mix.0", "mix.1",
 				"dvc.0", "dvc.1",
 				"clk_a", "clk_b", "clk_c", "clk_i";
 
@@ -1564,6 +1566,11 @@
 			};
 		};
 
+		rcar_sound,mix {
+			mix0: mix@0 { };
+			mix1: mix@1 { };
+		};
+
 		rcar_sound,ctu {
 			ctu00: ctu@0 { };
 			ctu01: ctu@1 { };