ARM: dts: iwg22d-sodimm: Sound DMA support via SRC on DTS

DMA transfer to/from SRC

     DMA      DMApp
[MEM] -> [SRC] -> [SSIU] -> [SSI]

     DMA      DMApp
[MEM] <- [SRC] <- [SSIU] <- [SSI]

Current sound driver is supporting SSI/SRC random connection.
So, this patch is trying
SSI3 -> SRC3
SSI4 <- SRC4
Signed-off-by: Biju Das <biju.das@bp.renesas.com>
Reviewed-by: Fabrizio Castro <fabrizio.castro@bp.renesas.com>
Signed-off-by: Simon Horman <horms+renesas@verge.net.au>

arch/arm/boot/dts/r8a7745-iwg22d-sodimm.dts

@@ -183,8 +183,8 @@ &rcar_sound {
 
 	rcar_sound,dai {
 		dai0 {
-			playback = <&ssi3>;
-			capture = <&ssi4>;
+			playback = <&ssi3 &src3>;
+			capture = <&ssi4 &src4>;
 		};
 	};
 };