ARM: shmobile: koelsch: (1+1)GiB memory in DT

Fix dts to have memory 1GiB @ 0_4000_0000 + 1GiB @ 2_0000_0000
according to Koelsch's hardware manual.
Signed-off-by: Takashi Yoshii <takasi-y@ops.dti.ne.jp>
Signed-off-by: Simon Horman <horms+renesas@verge.net.au>

arch/arm/boot/dts/r8a7791-koelsch.dts

@@ -23,7 +23,12 @@ chosen {
 
 	memory@40000000 {
 		device_type = "memory";
-		reg = <0 0x40000000 0 0x80000000>;
+		reg = <0 0x40000000 0 0x40000000>;
+	};
+
+	memory@200000000 {
+		device_type = "memory";
+		reg = <2 0x00000000 0 0x40000000>;
 	};
 
 	lbsc {