ARM: shmobile: r8a7791: 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/r8a7791.dtsi

@@ -1649,7 +1649,7 @@ rcar_sound: sound@ec500000 {
 		reg =	<0 0xec500000 0 0x1000>, /* SCU */
 			<0 0xec5a0000 0 0x100>,  /* ADG */
 			<0 0xec540000 0 0x1000>, /* SSIU */
-			<0 0xec541000 0 0x1280>, /* SSI */
+			<0 0xec541000 0 0x280>,  /* SSI */
 			<0 0xec740000 0 0x200>;  /* Audio DMAC peri peri*/
 		reg-names = "scu", "adg", "ssiu", "ssi", "audmapp";