cpu: Handle external TLBI Sync requests in O3CPU

JIRA: https://gem5.atlassian.net/browse/GEM5-1097

Change-Id: I02e55a42e0f717211b481e65d59900fc3d05f061
Reviewed-on: https://gem5-review.googlesource.com/c/public/gem5/+/57292
Reviewed-by: Jason Lowe-Power <power.jg@gmail.com>
Maintainer: Jason Lowe-Power <power.jg@gmail.com>
Tested-by: kokoro <noreply+kokoro@google.com>
4 files changed