arm: dts: kirkwood: fix error in #sound-dai-cells size

dtc now gives the following warning:

arch/arm/boot/dts/kirkwood-t5325.dtb: Warning (sound_dai_property): /sound/simple-audio-card,cpu:sound-dai: property size (4) too small for cell size 1

The binding documentation gives no indication what the cell size should
be (which should be fixed too), so just assume 0 is fine as that is what
the consumer has.

Cc: Jason Cooper <[e-mail]>
Cc: Andrew Lunn <[e-mail]>
Cc: Gregory Clement <[e-mail]>
Cc: Sebastian Hesselbarth <[e-mail]>
Signed-off-by: Rob Herring <[e-mail]>
Reviewed-by: Andrew Lunn <[e-mail]>
Signed-off-by: Gregory CLEMENT <[e-mail]>

arch/arm/boot/dts/kirkwood.dtsi

···
 
 		audio0: audio-controller@a0000 {
 			compatible = "marvell,kirkwood-audio";
-			#sound-dai-cells = <1>;
+			#sound-dai-cells = <0>;
 			reg = <0xa0000 0x2210>;
 			interrupts = <24>;
 			clocks = <&gate_clk 9>;