gem5:  Enumerate all available DRAM ranges

arch/arm64/boot/dts/aarch64_gem5_server.dts

diff --git a/arch/arm64/boot/dts/aarch64_gem5_server.dts b/arch/arm64/boot/dts/aarch64_gem5_server.dts
index 217cd21..5d97b72 100644
--- a/arch/arm64/boot/dts/aarch64_gem5_server.dts
+++ b/arch/arm64/boot/dts/aarch64_gem5_server.dts
@@ -58,9 +58,20 @@
 
     memory@80000000 {
         device_type = "memory";
-        reg = <0x00000000 0x80000000 0 0x80000000>;
+        reg = <0x00000000 0x80000000 0x0 0x80000000>;
     };
 
+    memory@880000000 {
+        device_type = "memory";
+        reg = <0x00000008 0x80000000 0x7 0x80000000>;
+    };
+
+    memory@8800000000 {
+        device_type = "memory";
+        reg = <0x00000088 0x00000000 0x78 0x00000000>;
+    };
+
+
     gic: interrupt-controller@2c001000 {
          compatible = "arm,cortex-a15-gic", "arm,cortex-a9-gic";
          #interrupt-cells = <3>;