misc: Merged m5ops_base hotfix into develop

This hotfix was a cherry-pick of
https://gem5-review.googlesource.com/c/public/gem5/+/30914.

Change-Id: Icb57bca196d8112d8b4457264b8e695cef0b1068

diff --cc RELEASE-NOTES.md
index adf33b295ab2ca057297ff6ce63abeb63fa97af2,f1478c50ced8b2027f5dac26e736c4a86093efc9..1a97b4c0a3eb33d30dbabcdd724bae9916cdc611
--- 1/RELEASE-NOTES.md
--- 2/RELEASE-NOTES.md
+++ b/RELEASE-NOTES.md
@@@ -1,7 -1,7 +1,11 @@@
 +# Version 20.1.0.0
 +
 +* m5.stats.dump() root argument renamed to roots to reflect the fact that it now takes a list of SimObjects
 +
+ # Version 20.0.0.3
+ 
+ **[HOTFIX]** When using the ARM ISA, gem5 could crash when a guest tried to call m5ops. This was due to `m5ops_base` being incorrectly declared in `src/arch/arm/ArmSystem.py`. A fix was applied to remove this declaration.
+ 
  # Version 20.0.0.2
  
  **[HOTFIX]** A patch was applied to fix the RubyPrefetcher with MESI_Three_Level. Prior to this fix a segfault occurred.