We can now be sure register_id will work even mid static initializers, so we don't have to use python initialization as a hook to install these predefined message ids. Change-Id: I2e4d0c678ddda0a9ce5b114bdf1710f36e955f23 Reviewed-on: https://gem5-review.googlesource.com/c/13976 Maintainer: Gabe Black <gabeblack@google.com> Reviewed-by: Jason Lowe-Power <jason@lowepower.com>