ARM: shmobile: r8a7778: tidyup SSI resource region

Signed-off-by: Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>
Acked-by: Geert Uytterhoeven <geert+renesas@glider.be>
Signed-off-by: Simon Horman <horms+renesas@verge.net.au>

arch/arm/boot/dts/r8a7778.dtsi

@@ -239,7 +239,7 @@ rcar_sound: sound@ffd90000 {
 		#sound-dai-cells = <1>;
 		compatible = "renesas,rcar_sound-r8a7778", "renesas,rcar_sound-gen1";
 		reg =	<0xffd90000 0x1000>,	/* SRU */
-			<0xffd91000 0x1240>,	/* SSI */
+			<0xffd91000 0x240>,	/* SSI */
 			<0xfffe0000 0x24>;	/* ADG */
 		clocks = <&mstp3_clks R8A7778_CLK_SSI8>,
 			<&mstp3_clks R8A7778_CLK_SSI7>,