system-arm: update armv8 cpu-release-addr

In the cl below, cpu-release-addr is changed to 0x87fffff8.
https://gem5-review.googlesource.com/c/public/gem5/+/35076

By fixing cpu-release-addr, we are able to bring up multi-core platform.

Change-Id: I48bb678f67b677e9fc0136c378407e06ce7a46f4
Reviewed-on: https://gem5-review.googlesource.com/c/public/gem5/+/42484
Reviewed-by: Giacomo Travaglini <giacomo.travaglini@arm.com>
Maintainer: Giacomo Travaglini <giacomo.travaglini@arm.com>
Tested-by: kokoro <noreply+kokoro@google.com>
diff --git a/system/arm/dt/armv8.dts b/system/arm/dt/armv8.dts
index 42c6ef6..6ea7820 100644
--- a/system/arm/dt/armv8.dts
+++ b/system/arm/dt/armv8.dts
@@ -38,7 +38,7 @@
 		compatible = "gem5,armv8", "arm,armv8"; \
 		reg = < n >; \
 		enable-method = "spin-table"; \
-		cpu-release-addr = <0 0x8000fff8>; \
+		cpu-release-addr = <0 0x87fffff8>; \
 	};
 
 / {
diff --git a/system/arm/dt/armv8_big_little.dts b/system/arm/dt/armv8_big_little.dts
index 9d1e7ac..39d6d9b 100644
--- a/system/arm/dt/armv8_big_little.dts
+++ b/system/arm/dt/armv8_big_little.dts
@@ -46,7 +46,7 @@
 		compatible = "gem5,armv8", "arm,armv8"; \
 		reg = < ## id >; \
 		enable-method = "spin-table"; \
-		cpu-release-addr = <0 0x8000fff8>; \
+		cpu-release-addr = <0 0x87fffff8>; \
 	};