arm64: dts: renesas: r8a77990-ebisu: use simple-audio-card

Current Ebisu board is using simple-scu-audio-card
which is used for Sampling Rate Convert, or MIXer, etc.
But, Ebisu is not using such feature.
Then, simple-audio-card is very enough.
This patch fixup it.
Signed-off-by: Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>
Signed-off-by: Simon Horman <horms+renesas@verge.net.au>

arch/arm64/boot/dts/renesas/r8a77990-ebisu.dts

@@ -169,16 +169,13 @@ vbus0_usb2: regulator-vbus0-usb2 {
 	};
 
 	rsnd_ak4613: sound {
-		compatible = "simple-scu-audio-card";
+		compatible = "simple-audio-card";
 
 		simple-audio-card,name = "rsnd-ak4613";
 		simple-audio-card,format = "left_j";
 		simple-audio-card,bitclock-master = <&sndcpu>;
 		simple-audio-card,frame-master = <&sndcpu>;
 
-		simple-audio-card,prefix = "ak4613";
-		simple-audio-card,routing = "ak4613 Playback", "DAI0 Playback",
-		"DAI0 Capture", "ak4613 Capture";
 		sndcpu: simple-audio-card,cpu {
 			sound-dai = <&rcar_sound>;
 		};